TO THE GENUS HALICTUS (CHLORALICTUS)

NEW NORTH AMERICAN SPECIES OF BEES BELONGING TO THE GENUS HALICTUS (CHLORALICTUS)

.

By Grace Adelbert Sandhouse,

oftheUniversity of Colorado, Boulder.

INTRODUCTION.

Since the

name

Chloralictus

was

suggested

by

Robertson in 1902 forcertain ofthe metallic-colored Halictinebees,

many

interesting

new

species

have

been

added

to this subgenus.

The Rocky Mountain

States, with their very diversehabitats, have yielded a majority of thespecies,

and

still continue to yield

many

species.

Through

the efforts of Robertson considerable knowledge of the CMoralicti of Illinois has been given us, and the Chloralictus fauna of the east- central States seems to be quite like that of Illinois.

The number

of species reported

from

the vSouthern States has been remarkably small, a

few

having been recorded

from

Florida. In the Pacific States, Californiahasyielded several very interesting species.

In the collection of Prof. T. D. A. Cockerell, of the University of Colorado, is a

number

of Chloralictus

—

^both

^{male and}

^females

— ^from

widelyseparatedlocalities.

Durmg

thelast yearthe writer has been privileged to

work up

this collection

under

the supervision of Pro- fessor Cockerell.

The

result has been an unusually large

number

of

new

species. In very few cases

were

there representativesofthe

two

sexes

from

onelocality; or, if so represented, the differences

between

the sexes were so great that it

was

not considered advisable to at-

tempt

to

match them

until further datawere obtained.

Keys have

been compiled for all of the species represented in Professor Cock-

erell's collection as wellasthe

new

species, butit

was

not foundprac- ticable toinclude in these

key

species

known

only

from

descriptions.

KEYTOFEMALESOFHALICTUS (CHLORALICTUS).'

Comparativelylarge,anteriorwingat least 6

mm.

long; wingssomewhatdusky,

except in connexus 1

Smallerspecies,usuallywithpalerwings 9

1. Abdomenblueorgreen 2

Abdomenblack 4

'Seesecond paragraphofintroductionforstatementofspeciesincludedinthiskey.

No. 2532

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Proceedings U. S. National Museum. Vol. 65, Art. 19.

45554—

25—

Proc.N.M.vol.65 38 1

2

PROCEEDINGS OF THE

NATIONAL,

MUSEUM.

^{vol. C5.}

2. Mesothorax darkblue,coarselygranular (Costa Rica) sudus Vachal.

Mesothorax green 3

3. Mesothorax shiningolivegreen, with scattered punctures aquilaeCockerel1 .

Mesothoraxbrassy green,closely punctured (Colorado).^.olivarius,newspecies.

4. Head and thoraxdark blueorblue-green 5

Headandthoraxlargelygreen; no bluetints 6

5. Mesothorax dullish, with rather close punctures; disk of propodeum with plicaelargelyconfinedtothe bas.ilpart(New Mexico) euryceps Ellis Mesothoraxsomewhatshining,moresparsely punctured; disk ofpropodeum

rugose (Massachusetts) nigroviridisGraenicher.

6. Mesothorax rugoso-punctate (Iowa) bruneriCrawford

.

Mesothoraxdistinctly punctured 7

7. Mesothorax withsmall closepunctures; diskofpropodeum with somewhat

discontinuous rugae (Colorado) zophops Ellis.

Mesothoraxcoarsely punctured (EasternStates) 8 8. Wings clear; disk of propodeum brassy green,crescentic, plicate.

connexusCresson.

(Tegulaeand wings reddish) subconnexusEllis.

Wingsnotclear; tegulae dark; diskofpropodeum blue,strongly rugose.

nymphaearumRobertson.

9. Cheeks withalarge tubercle below; head large; abdomen with greenish

luster(NewMexico) oleosus Cockerell.

Cheeksnot thus tuberculate 10

10. Smallspecieswithpunctured tegulae ¹¹

Tegulaenot thuspunctured 15

11. Wingsclear; stigmapale; headandthorax blue-green 12

Wingssomewhatdusky; head andthorax green, sometimes brassy 13 12. Tegulaetruncate posteriorly; disk of propodeum with irregularly anasto-

mosing rugae^(Illinois) tegularisRobertson.

Tegulae pointedposteriorly; disk ofpropodeumgranular(NewMexico).

tegulariformisCrawford.

13. Mesothorax green; disk of propodeum plicate (Massachusetts).

ellisiae, new species.

Mesothoraxoftenbrassyorcoppery; diskofpropodeumnotplicate 14 14. Mesothoraxbrassywith purplishreflections; tegulae stronglypunctured;disk

ofpropodeumlongwithradiatingrugae perparvusEllis.

Mesothorax golden green; disk of propodeum short, gTanular; tegulae deli-

cately punctured pseudotegularis Cockerell.

Mesothorax very darkolivegreen; diskofpropodeum long,granular; tegulae stronglypunctured (California) helianthi Cockerell.

15. Abdomen largely blueorgreen 16

Abdomen red 30

Abdomen blackorbrown 43

16. Brilliant steel bluespecies; ^ving8somewhatdusky; stigmadark(Illinois).

coeruleus Robertson.

Not socolored 17

17. Wingswhite, veryclear; stigma honey color; pubescence pure white 18

Wingsnotthusclear; stigmadarker; pubescencedulloryellowish white 22 18. Mesothoraxblue, sparselypunctured; abdomen polished, impunctate (New

Mexico) semicoeruleus Cockerell.

Mesothorax golden or blue-green, more closely punctured; abdomen punc-

tured 19

19. Head oval; diskofpropodeumwithdiscontinuous plicae pruinosusRobertson.

Head normal, subcircular 20

ART.19.

AMERICAN

BEES OF

THE GENUS HALICTUS SANDHOUSE 3

20. Apexofflagellum ferruginous; mesothorax opaque,closelypunctured; disk ofpropodeumwithirregularlyanastomosingrugae(NewMexico).

microlepoidesEllis.

Flagellumnot ferruginous; mesothoraxpolished, coarselypunctured 21 21. Diskofpropodeumbrilliant blue,rugose pruinosiformis Crawford.

Diskofpropodeumcolor ofmesothorax,rugulose (Colorado).

glaucovirens Cockerell.

22. Mesothorax verycloselypunctured with bothcoarseandfinerpunctures; disk ofpropodeumplicate (California) diversopunctatusEllis,

Mesothoraxnot thuspunctured 23

23. Head narrow; orbits almost parallel; flagellum yellow-testaceous beneath

(Colorado) pavoninusEllis.

Headnormal, subcircular; orbitsconverging 24

24. Tegulaedark; darkblue-green species 25

Tegulaelight; lighter species 26

25. Abdomenobovate; diskofpropodeumshining, plicate(Colorado).

sedi.newspecies.

Abdomen more slender; diskofpropodeum brilliant blue, with irregularly anastomosingrugae⁽

New

Mexico) veganusCockerell.

26. Wings andtegulae reddish; mesothoraxopaque,verycloselypunctured; disk ofpropodeumgranular (Colorado) lazulis Ellis.

Wings andtegulaenotreddened 27

27. Mesothorax polished olive green, delicately pimctured; diskofpropodeum

long, plicaeconfinedtobasalpart (Colorado) academicus,newspecies.

Mesothoraxgoldengreen, closelypunctured 28

28. Head comparatively broad; disk of propodeum granular; pubescence yel- lowish; flagellum yellow-testaceousbeneath (California).

actinosus, newspecies.

Head normal 29

29. (Theseseem to be veryclosely related.)

Flagellum dusky ferruginous atapex; disk of propodeum microscopically tessellatebetween anastomosingrugae (Illinois) pilosus Smith.

Specieslittlesmaller:

Flagellumclearferruginousatapex;scutellumgoldengreen (Colorado) succinipennis ^Ellis.

Scutellumcolor ofmesothorax; diskofpropodeumlongerthaninthetwo precedingspecies, polishedattheapex (Maine).

pilosusleucocomus^Lovell.

30. Abdomen duskyred 31

Abdomenclear red ororange-red 35

31. Larger, 6-7

mm.

long 32

Smaller, less than 5

mm.

long 33

32. Wingsfaintlydusky; head and thorax olive green,very closelypunctured

(California) petrellus Cockerell.

Wingsveryclear; headand thorax shining blue-green,moresparselypunc-

tured (New Mexico) eophilusEllis.

33. Headand thorax blue-green; flagellum ferruginous, paler beneath.

stultus Cresson- Head andthoraxolivegreen; flagellumdark 34 34. Abdomen largelydark and submetallic; the light partsorange-ferruginous

(Florida) nymphalis Smith.

Abdomenchestnut red,alittle greenish on middle of thirdsegment (Ne-

braska) plctus Crawford.

4 PROCEEDINGS

OF

THE NATIONAL MUSEUM.

^vol.65.

35. Head and thorax quitedensely clothed withahort ochraceous hair (East-

ernStates) vierecki Crawford.

Head and thorax not thus clothed 36

36. Mesothorax blue,shining,delicately punctured 37

Mesothorax green 38

37. Facequadrate; diskofpropodeumpolished,with weakplicaeonbase only

(Arizona) kunzeiCockerell.

Face subcircular; disk of propodeum with anastomosing rugae(New Mex-

ico) clarissimusEllis.

38. Disk of propodeum shining, plicate, abdomen hoary with yellowish hair

(Wisconsin) graenicheriEllis.

Diskofpropodeumgranularorreticulated 39

39. Mesothoraxcloselypunctured 40

Mesothoraxsparselyordelicatelypunctured 41

40. Head broad; disk of propodeum long, reticulated; flagellum dark (New

Mexico) clematisellus Cockerell.

Headnormal; diskofpropodeumshort,granular; flagellum testaceous(Colo-

rado) hudsoniellusCockerell.

41. Thoraxandabdomenhoary with whitehair; diskofpropodeumshort,with coarselyanastomosingrugae(NewMexico) mesillensis Cockerell.

Thorax and abdomen not thus hoary; disk of propodeumlong 42 42. Larger, about 6

mm.

long; flagellum dark,dusky ferruginous at the apex;

legs largelydark (Colorado) scrophulariae Cockerell.

Smaller, 4.5

mm.

long; flagellum yellow- testaceous beneath; legs largely

testaceous (NorthDakota) ^testaceusRobertson.

43.Smallspecies, anteriorwing about3

mm.

long;oftenwith veryclearwings.. 44

Larger species 55

44. Tegulaedark;wings faintly dusky ^• 45

Tegulaelight;orif tegulae reddened, wings clear 49

45. Headandthorax blue 46

Head and thorax green 47

46. Mesothorax very dark blue, finely and closely punctured; disk of propo-

deumsemicircular, finelygranular(NewMexico).

ruidosensis Cockerell, variety.

Mesothorax more brilliant blue, more coarsely punctured; disk of propo-

deumtruncateposteriorly,granularwithfineradiating plicae(St. Vincent,

W.L) plumbeus Ashmead.

47. Diskofpropodeumgranular; mesothorax opaque (Jamaica) jamaicae Ellis.

Disk of propodeum not granular, plicate on basal portion; mesothorax

somewhatpolished 48

48. Mesothoraxbrassy green; diskofpropodeumshort(Jamaica).

liguanensls,newspecies.

Mesothoraxnotbrassy;diskofpropodeum longer(Guatemala) deceptorEllis.

49. Wingsmilkywhite, orvery clear white 50

Wings yellowish 53

50. Mesothorax opaque,granular; diskofpropodeumgranular(Virginia).

coreopsisRobertson- Mesothorax shining blue, delicately punctured; disk of propodeum not

orhardly granular 51

51. Head, thorax, and abdomen hoary with white hair; disk of propodeum

plicateonbaseonly(NewMexico) pallidellus Ellis.

Notthus hoary ⁵²

ABT,19.

AMERICAN

BEES OF

THE GENUS HALICTUS — ^SANDHOUSE.

5

52. Head narrow; fiagellum clear ferruginous; disk of propodeum polished.

semibrunneusCockerell.

Headnormal;flagelluradark; diskofpropodeum faintly granular with fine radiating plicae(EasternStates) sparsus Robertson.

Diskof propodeum not granular; mesothorax more coarsely punctured

(WesternStates) sparsus, variety EllisMSP.

53. Mesothoraxpolished,delicatelypunctured;diskof propodeum weakly pli-

catulateonbaseonly exiguusSmith.

Mesothorax opaque;sculpturingofdiskofpropodeum,not confinedtobase.. 54 54. Mesothorax withsparseshallow punctures; diskofpropodeumplicate(Massa-

chusetts) admirandus,newspecies.

Mesothorax more closely punctured; disk of propodeum rugose (Nevada).

nevadensisCrawford.

55.Tegulaedark;wingsdusky;stigmadark 56

Tegulaelight;orif somewhatdark, wingsnotdusky 63 56. Head and thorax brassyorbronze green; abdomen with bronze reflections;

diskofpropodeum plicateonbase only (Guatemala) umbripennis Ellis.

Head and thorax notso 57

57. Mesothorax polished, sparsely punctured; diskofpropodeumwithweakpli- caelargelyconfinedtobase (Colorado) tenax,newspecies.

Mesothorax opaque,more closely punctured 58

58. Mesothorax very closely punctured, giWng a granular appearance; disk of

propodeum granular,apexpolished (Coloradoand

New

Mexico).

ruidosensisCockerell.

Mesothorax notso closelypunctured;diskofpropodeumnot granular. 59 59. Larger;mesothorax verycoarselypunctured;diskofpropodeumverysharply

truncated, withcoarse plicae (New Jersey) oceanicus Cockerell.

Smaller; notsosculptured 60

60. Abdomenandlegsbrown; mandiblesred; diskofpropodeum withradiating

rugulae(Grenada,W.I.) sanctivincentiAshmead.

Abdomenandlegs black; mandibles dark 61 61. Fiagellumduskyferruginous; diskofpropodeumshort, the plicae not reach-

ing the apex,which^ispolished(Maine) versans Lovell.

Fiagellum black; plicae reaching the apex of diskofpropodeum,whichis

longer (Colorado) 62

62. Mesothorax with shallow, scattered punctures; apical marginsofabdominal segmentstestaceous;abdomennarroweratbase pacatus,newspecies.

Mesothorax quite closelypunctured; apicalmarginsofabdominal segments black; abdomenbroadatthe base viridatulus Cockerell.

63. Wingsclearwhite; pubescence purewhite, abundant 64 Wingsmoreorlessyellowish;pubescence moresparse, dulloryellowish white.. 67 64. Mesothorax verycoarselypunctured; diskofpropodeumwithsomewhatdis-

continuousplicae; abdomen black albipennis Robertson.

Mesothoraxnotsocoarselypunctured;abdomen brown 65 65. Smaller; mesothorax blue,delicatelypunctured; diskofpropodeumreticu-

lated (New Mexico) alius, newspecies.

Larger; mesothorax goldengreen,closelypunctured;diskofpropodeumnot

reticulated 66

66. Diskofpropodeumbrilliantblue,granular(NewMexico),.perdifficilisCockerell.

Diskofpropodeum colorofmesothorax,plicate, polishedattheapex (Leth-

bridgeAlta.) laevissimusSmith.

67. Facesubquadrate; innerorbitsarched above; clypeus andsupraclypeal area

polished 68

Notso; head narrowor subcircular 69

6

PROCEEDINGS

OF

THE NATIONAL MUSEUM.

^vol.65.

68. Meaothoraxdelicatelypunctured (Eastern States) hortensis Lovell.

Mesothoraxcoarselypunctured (Western States) crassiceps Ellis.

69. Headandthorax rugoso-punctate (See 6)(Iowaand Nebraska)^..bruneriCrawford.

Headandthoraxwith moreor lessdistinct punctures 70 70. Headverynarrow; flagellum clear ferruginous;mesothoraxgranular,with

shallow punctures; diskof propodeumgranular(NorthCarolina).

longicepsRobertson.

Not so 71

71. Smalland^slenderspecies; abdomen somewhat bluish; disk of propodeum

obscurely sculptured (Colorado) tenuisEllis.

Not so 72

72. Mesothoraxgoldenorbrassygreen 73

Mesothoraxnotsocolored 80

73. Mesothorax coarselypunctured 74

Mesothorax withfineor delicatepunctures 77

74. Mesothorax withcontiguous punctures; diskof propodeumwithirregularly anastomosing rugae (Colorado) perpunctatusEllis.

(Mesothoraxnotorhardlygolden, but withsimilar punctationtothatabove;

diskofpropodeum withrugae notanastomosing (California) (EllisMSS).

perpunctatus, var. californiaeElUs, newvariety.'

Notso punctured 75

75. Tegulaepale; wings clear; disk of propodeum microscopically tessellate betweenrugae; apex^ofabdomensomewhatgreenish (Texas).

disparilis Crawford.

Tegulaeand wings reddened, abdomenentirelyblack(NewJersey) 76 76. Mesothoraxpolished; diskofpropodeumstrongly rugose.^..cressonli Robertson.

Mesothorax opaque; diskofpropodeum plicate cattellaeEllis.

77. Small; mesothorax very closely punctured, bronzen; disk of propodeum granularwithradiatingplicae (Jamaica) gemmatusSmith.

Larger; not so 78

78. Disk of propodeum obscurely sculptured; legs and abdomen brown,with

yellowishpubescence(Illinois) zephjrrusSmith.

Legs andabdomenblack; diskofpropodeumnotsosculptured 79 79. Legsentirelyblack; tegulaereddened; diskofpropodeumplicatulate (New

Mexico) caducus,newspecies.

Legsnot so,withkneesred; tegulae pale; disk of propodeum with anasto- mosing rugae (California) impavidus, newspecies.

80. Mesothorax opaque, closely or coarsely punctured 81 Mesothoraxshining, delicately orsparselypunctured 85 81. Tegulae reddish; mesothorax with coarse punctures; disk of propodeum

plicate (Maine) viridatus Lovell.

(Mesothoraxsomewhatbrassy, moreslender; plicaesomewhat wrinkled.

viridatus, varietya, newvariety).'

Tegulaepale; mesothorax finelypunctured 82

82. Diskof propodeumgranular(Florida) 83

Diskofpropodeumnot granular 84

>Mrs.Ellishadthe following notesonthisvariety:'"Californiaspecimensofperpunctatusdifferinthe mesothorax beingsmoother,the puncturesbeing smaller; basal areaofthemetathorax withtherim a

littlesharperinthe variety. Two^specimens,Pasadena."

'Mrs. Ellishadpointed out thisvariety,buta nimenowpreoccupiedwis given. Thewriterhas preferredto designatethe variety byaletteronly. Mrs.Ellis's noteswere as follows: "Varietyois

moreslenderand hastheabdomen moremetallicandthemarginsoftheabdominal segmentslesstesta- ceous."

AKT. 19.

AMERICAN

BEES OF

THE GENUS HALICTUS SANDHOUSE.

7

83. Larger; pubescenceyellowish; legsbrown; abdomenbrownish, apical mar- ginsofsegmentsbroadly testaceous floridanus Robertson.

Smaller;pubescencedullwhite;legsandabdomenblack,.ashmeadii Robertson.

84. Diskofpropodeumshining,microscopically tessellatebetween discontinu-

ous plicae versatus Robertson.

Diskof propodeumdull, withirregular, wrinkled rugae (NewMexico).

comis,newspecies.

85. Tegulaesomewhatreddened (MountainStates) 86

Tegulaepale testaceous 89

86. Smaller, slenderspecies;plicae confinedtobase ofdiskofpropodeum 87 Larger,robustspecies; head broad; plicaereachingtheapexofthe diskof

propodeum 88

87. Diskofpropodeumblue, shining, withfew plicae meritus, newspecies.

Diskofpropodeumgreen; plicate at sidesof disk; somewhat anastomosing rugaeonmedianpart of disk arcanus,new species.

88. Diskofpropodeumcrescentic latus, newspecies.

Diskof propodeumlonger; plicae weak on median^part of disk.

phaceliarum Cockerell.

89. Mesothoraxandscutellum polished, dark, verysparselypunctured; diskof

propodeumplicateonbase only; flagellum ferruginous; mandiblesclear

red (Guatemala) tropicior Ellis.

Not so; mesothorax blue-green, orlighter green 90 90. Headbroad; robustspecies;diskofpropodeumplicate(Iowa).

unicus,newspecies.

Headnormal ornarrow; moreslender species 91

91. Abdomenbrownish,slender,withquiteabundant whitehair; diskofpropo-

deumfinelygranularwithfewweakplicae(NewMexico) oblongusLovell.

Abdomenblack, broader,firsttwo segments without pubescence 92 92. Legsentirely black; diskof propodeum microscopically tessellate between

rugae 93

Kneesand tarsi reddened 94

93. Abdomensparselypubescent(Maine) oblongus planatus Lovell.

Abdomenwithsubappressed hair(Nebraska) politissimus Cockerell.

94. Diskofpropodeumplicate(Colorado) absimilis,new^species.

Diskofpropodeumweaklyruguloseonbase only (Iowa).

vintonensis,newspecies.

KEYTOMALESOF HALICTUS (CHLOBALICTUS).^<

Legsentirely red; underside ofabdomenred aquilae Cockerell.

Legsnot entirelyred; under sideofabdomennotred; orifreddish,then upper

side alsoreddish 1

1. Thorax and abdomen testaceous bruesi Cockerell.

Thoraxnot testaceous 2

2. Smallspecieswith punctured tegulae 3

Tegulaenotpunctured 6

3. Mesothoraxsteelblue; flagellum palebeneath 4 Mesothorax darkblue orgreenish blue; flagellumlittlepalerbeneath 5 4. Disk ofpropodeum brilliant blue, crescentic, plicate; flagellum yellow-

testaceousbeneath(California) gaudialis,newspecies.

Diskofpropodeum color of mesothorax, longer, rugose; flagellum chrome- orangebeneath(NewMexico) tegulariformis Crawford.

^Seesecond paragraphofintroductionforstatementofspeciesincludedinthiskey.

8 PROCEEDINGS

OF

THE NATIONAL MUSEUM.

vol.65.

5. Wingsfaintlyreddish; facecolorof mesothorax (Colorado).

paulolus,newspecies.

Wingsclear; stigmaandnervures testaceous; face olivegreen(Guatemala).

pseudotegularis Cockerell.

6. Abdomenblue or green 7

Abdomennot blueorgreen 11

7. Larger; golden green;pubescenceochraceous;wingsyellowish (Massachusetts),

pilosus Smith.

Smaller; blue; pubescence purewhite; wings veryclear 8 8. Head broader thanlong; diskofpropodeum with a semicircular inclosing rim.

(NewMexico) exalbidus, newspecies.

Headnotso; diskof propodeumnotso inclosed 9 9. Hoarywith very dense white pubescence; diskofpropodeumbrilliantblue,

plicate pruinosiformisCrawford.

Notso 10

10. Diskofpropodeum with irregularly wrinkledrugae; firstrecurrentnervure joiningsecondtrans verso-cubital(NewMexico) albohirtusCrawford Diskofpropodeumpolished, obscurely sculptured; second submarginalcell

receivingfirst recurrentnervurealittledistancefromtheapex(Colorado).

actuarius, newspecies.

11. Abdomen red, suffused with blackish; headand thorax green; diskofpro-

podeumplicate(Illinois) zephyrusSmith.

Abdomen blackordark brown 12

12. Clypeusentirely yellow,or at leastthelowerhalfyellow 13 Clypeusnot yellow,orthe anterior marginobscurely yellowish 18 13. Headandthorax olive green; flagellumdark (Colorado) sagax, newspecies.

Head andthorax blue-greenorblue; flagellumpalebeneath 14

14. Tegulae verypale; legslargelyyellow 15

Tegulae dark; legs largely dark ¹⁶

15. Mesothoraxsomewhat brassy; abdomenpunctured (NewMexico).

hyalinus Cra^vfo^d.

Mesothoraxblue-green; abdomen notpunctured(NewMexico).

perexiguus, newspecies.

16. Mesothoraxdelicatelypunctured; mandibles yellow (Colorado).

occultus, newspecies.

Mesothoraxcloselypunctured^; mandibles dark(Colorado) 17 17. Headandthoraxblue-gi'een; diskofpropodeumsubcrescentic.

evestigatus, newspecies.

Headandthorax blue; diskofpropodeumlonger, brilliant blue.

pikei,newspecies.

18. Tegulae and stigma dark; wings dusky; usually larger species, except

insulus andobnubilus 19

Tegulae and wings pale; oriftegulaereddened, then wings paler; usually small species, except nymphaearum, connexus,andalbipennis 29

19. Smallspecies, lessthan 5

mm.

long 20

Larger species 21

20. Mesothoraxblue-green; diskof propodeumplicate (Colorado).

obnubilus, newspecies.

Mesothoraxblue; diskofpropodeumplicateonbase only (NewMexico).

insulsus, new^species.

21. Headandthorax brassy olive green; diskofpropodeum rugose.

oblongusLovell.

Headandthoraxblueorgreen, not brassy 22

22. Sculpturing confinedtodiskofpropodeum 23

Sculpturing not confinedtodiskofpropodeum 24

ART.19.

AMERICAN

BEES OF

THE GENUS HALICTUS SANDHOUSE.

9

23. Diskofpropodeum plicatulate; apex polished; mesothorax closely punc-

tured (Colorado) ruidosensis Cockerell.

Diskofpropodeumwithsomewhatwrinkledplicaereaching the apex;meso- thoraxmoresparselypunctured (Colorado) consonus, new species.

24. Mesothoraxshining, sparsely or delicately punctured 25

Mesothorax opaque, coarsely punctured 26

25. Frontabovetheantennaeverycloselypunctured;diskofpropodeumrugose

(Colorado) praepes, new species.

Frontabove the antennae without true punctures;apex of disk of propo-

deumelevated, tessellate, baseweaklyplicate(NewMexico).

astutus, newspecies.

26. Tegulae and wings reddened; flagellum ferruginous beneath; mesothorax darkblue;pubescence on mesothoraxandvertex yellowish(New Mexico).

abundus,new species.

Tegulae and wings not reddened;Ilagellum testaceousbeneath 27 27. Disk of scutellum dull; disk of propodeum dull with irregular rugae (New

Mexico) tranquillus, newspecies.

Diskofpropodeum shining; diskofscutellum with twopolished spots 28 28. Mesothoraxblue; diskofpropodeumplicate(Colorado) pudicus,newspecies.

Mesothoraxgreen; diskofpropodeumcoarsely rugose viridatusLovell.

29. Large, 7mm. long; disk ofpropodeumrugose 30

Smaller ³²

30. Tegulae pale testaceous;mesothoraxcloselypunctured (Texas).

counexus Crawford.

Tegulae reddened; mesothoiax very coarsely punctured 31 31. Wingsnailkywhite; stigmahoney color; flagellum yellow-testaceous beneath.

albipennis Robertson.

Wingsnotso;flagellum testaceousbeneath nymphaearumRobertson.

32. Wings milky white; stigma and nervures honey color; mesothorax very coarsely punctured; diskofpropodeumplicate (Colorado).

lactineus,new^species.

Not so 33

33. Mesothorax opaque, microscopicallytessellate, verycloselypunctured 34 Mesothoraxshining,sparselyordelicatelypunctured ³⁷

34. Head and thoraxgoldengreen; diskofpropodeumplicate (Virginia).

callidus, new species.

Headand thoraxblue or blue-green,notgolden 35

35.Flagellumclear ferruginous; mandibles yellow;propodeum with discontin-

uous plicae (Virginia) apertus,newspecies.

Flagellumtestaceous,yellow-testaceous beneath;mandibles dark 36 36.Tegulaereddish;diskofpropodeumplicate;pubescenceofabdomen^yellowish

(Virginia) genuinus, new species.

Tegulaepaletestaceous;disk ofpropodeumrugose;pubescence ofabdomen

notyellowish versatus, Robertson.

37. Mesothoraxcoarselypunctured 38

Mesothoraxdelicatelypunctured ⁴⁰

38. Head and thorax brassy green; tip of clypeus and mandibles yellowish

vTexas) ^disparilis Crawford.

Head andthorax blue 39

39. Disk of propodeum strongly rugose, the rugae not confined to the disk

(Connecticut) ^basilicus, newspecies.

Diskofpropodeumbrilliantblue, plicaeconfinedtothedisk.

nevadensis Crawford.

10 PROCEEDINGS

OF

THE

NATIONAL.

MUSEUM.

^voi,.65.

40. Verysmall,anteriorwing about3

mm.

long 41

Larger 43

41. Head and thorax brassy green; flagellum black; diskof propodeum with plicaeonbase only,apexpolished (Vera Cruz,Mexico) exiguusSmith.

Head and thorax blue; flagellum testaceousbeneath 42 42. Disk of propodeum deep blue, short, plicate; knees and tarsi yellow

(Virginia) hortensis Lovell.

Diskof propodeum brilliant blue, longer, with fine, somewhat wrinkled plicae; legsentirelydark (NewMexico) microlepoides Ellis.

43. Tegulaesomewhat reddened; legs black; mandibles dark 44 Tegulae very pale; knees and tarsi red; mandibles red 45 44. Flagellumtestaceous beneath; face, mesothorax,scutellumandmesopleurae

brassy (Colorado) mactus, newspecies.

Flagellum hardlypalerbeneath; notthus brassy (Colorado).

pensitus,newspecies.

45. (Thefollowingareverysimilar insize, color,punctation, etc.):

Thirdjointof antennaesomewhat longer than second 46 Thirdjointof antennae hardlyorno longer than second 47 46. Diskofpropodeum plicate (Colorado) accentus, newspecies.

Disk of propodeumrugose (New Mexico) incompletusCrawford.

47. Abdomen entirely black,punctured(Colorado) mollis,newspecies.

Abdomen with piliferous puncturesonly, apical marginsof segments

testaceous 48

48. Mesothorax sparselyand delicately punctured; disk of propodeumplicate

(New Mexico) merosus, newspecies,

Mesothorax more closely punctured; disk of propodeum rugose 49 49. Diskofpropodeumcrescentic,with irregularlyanastomosingrugae reaching

the apex; legsand abdomen brown (Virginia) malinus, newspecies.

Diskofpropodeumlong,rugae reaching theapex whichispolished;abdomen

and legsblack (Iowa) insolitus, newspecies.

DESCRIPTIONS OF NEW

SPECIES.

HALICTUS (CHLORALICTUS) OLIVARIL'S, newspecies.

Female.

— ^About

^8.5

mm.

long; darkolive green; pubescencepale;

facial quadrangle longer than broad; front closely punctured, the punctures

becoming more

scatteredon the sides ofthe face; antennae brown,

becoming

bright ferruginous at the

apex

of the flagellum;

orbits converging slightly below; clj^peus black, coarselypunctured;

supraclypeal area brassy, sparsely punctured.

Mesothorax

golden green, very ^closely punctured; parapsidal grooves quite indistinct;

scutellum closely punctured; disk of

propodeum

^appears rugose, but

iscovered with finely wrinkled anastomosing rugae

making an

irreg- ularreticulate surface; truncation well defined laterally; tegulae pale testaceous,impunctate.

Abdomen

ovate,withoutdistincthairbands, but with pale pubescence covering the segments; apical margins of segments testaceous.

Wings

yellowish, faintly dusky; anterior

wing

about 6

mm.

long; stigma

and

nervures pale testaceous; basalncrvure very strongly bent; thh-d submarginal cell strongly contracted above,

more

than twice aslong as second

on

marginal; second sub- marginal higher than broad, receiving first recurrent nervure very

AET.19.

AMERICAN

BEES OF

THE GENUS HALICTUS SANDHOUSE. 11

near apex. Legs dark with dull whitish hairs; knees red; tarsi

somewhat

reddened; hind spui" pectinate with five

medium

long obtuse spines.

Habitat.

— Jumbo

Keservoir, 9 miles east of Crook, Colorado,

August

12, 1921 (Sandhouse).

One

specimen.

Type.—

Cat. No. 26399,

U.S.N.M.

This species seems to be quite distinct

and

different

from any

other Chloralictus

known

to thewriter.

HALICTUS (CHLORALICTUS)ELLISIAE. new species.'

Female.

— About

5

mm.

long;

head and

thorax dark ^olive green,

abdomen

black; pubescence dull white, rather sparse. Facial quad- rangle longer than broad; orbits convergingslightly below; antennae dark

brown;

front veryclosely punctured; sides of facewithcoarser, deeper,

more

scattered punctures; supraclypeal areashining,sparsely punctured; lowertwo-thirdsofclypeus black,with a few coarse punc- tures; mandibles black.

Mesothorax

microscopically lineolate

and

closely punctured; scutellum very ^closely punctured,

two smooth

spots

on

thedisk; diskof

propodeum

without adistinct inclosing rim, microscopicallyreticulate between rugae^; mesopieuraecoarselypunc- tured; tegulae dark, punctured; truncation distinct, but not sharply definedlaterally.

Abdomen

broadlyovate,the onlypunctures^pilifer- ous;segmentssparsely clothedwithyellowish-whitepubescence;apical margins of segments brownish, transversely lineolate. Anterior

wing

3.5

mm,

long; wings clear hyaline; stigma

and

nervures dark testa- ceous; second submarginal ^cellas broad ashigh at the base, but con- tracted above, receiving the first recurrent nervure near apex; third submarginal almost twice aslongas second

on

marginal. Legs dark with yellowish-white pubescence; inner spur pectinate with four moderatelylong teeth.

Habitat.

—

^{Forest Hills,} Massachusetts,

August

5, 1911. Received

from

Dr.

W. M.

Wheeler.

One

specimen.

Type.—

Cat. No. 26400, U.S.N.M.

Distinct

from

tegulariformis Crawford,

from which

it differs

by

the darker tegulae

and

stigma; broader head; darker flagellum;

more

closely punctured mesothorax;

more

robust species; distinct sculp- turing of disk of

propodeum.

From

^tegularis Robertson

by

the shining head

and

thorax; darker wings; tegulae darker, not reddish; darker flagellum; disk of pro-

podeum

notgranular, but with fine plicae.

From

pseudotegularis ^Cockerell,

which

is avery small

and

slender species,with golden green

mesothorax and

scutellum,

and

with disk of

propodeum

granular.

5Mrs.Ellisreferredthis specimentohr<rlensU Lovell,t)ntthepuncturedtegulaeseemtobedistinct.

Thespecieswas namedforMrs.Ellis.

12 PROCEEDINGS OF THE

NATIONAL,

MUSEUM.

^vol.65.

From

perparvus Ellis,

which

isverysmall

and

dark, with delicately punctured tegulae;

and

has

a

golden green

mesothorax and

the disk of the

propodeum

granular.

HALICTUS(CHLORALICTUS)SEDI. new species.

Female.— About

6

mm.

long; dark greenish blue; pubescence dull white, rathersparse. Facial quadranglelongerthan broad; sides of face, supraclypeal area,

and upper

portion of clypeus brassy green;

front very closelypunctured, the punctures

becoming more

scattered below; supraclypeal area

and

upperportion ofclypeus withfew deep punctures; lowerpart of clypeus black,without punctures; flagellum black, dark testaceous beneath.

Mesothorax

microscopically tessel- late, with delicate punctures; scutellum closely punctured,

two

pol- ished spots

on

the disk; disk of

propodeum

shining, with fine plicae

on

the lateral,

and

anastomosing rugae on the

median

portions, pol- ished at the apex; mesopleuraeindistinctlypunctured; tegulae testa- ceous, impunctate; truncation well defined laterally.

Abdomen

obovate, polished, very delicately punctured, without distinct hair bands, but segments sparsely covered with hairs; apical margins of segmentstestaceous. Anterior

wing

about4.5

mm.

long; wings quite clear; stigma

and

nervures pale testaceous; second submarginal cell

as broad ashigh, receiving the firstrecurrentnervure near the apex!

almost equidistantwiththe third submarginalonmarginal; subcostal nervurevery dark. Legs dark withdullwhite pubescence; hind spur pectinatewith fourmoderately long teeth.

Habitat.

—

^{Boulder,Colorado: 1 specimen}

June

21,

on Sedum

steno- petalum (Cockerell); 1 specimen

May

20 (M. Pope).

Type.—

Cat. No. 26401,

U.S.N.M.

Distinguished

by

the highly polished

abdomen,

HALICTUS(CHLORALICTUS) ACADEMICUS,newspecies.

Female.

— ^About

^G

mm.

long;dark blue-green; pubescenceyellowish white. Facial quadrangle longer than broad; orbits converging slightlybelow; the only punctures

on

the face piliferous; antennae dark, flagellum ferruginous beneath; clypeus

and

supraclypeal area

smooth and

highly polished, without punctures, flat; lower half of clypeus black.

Mesothorax

shining, the only punctures piliferous;

disk of

propodeum

rather long, microscopically tessellate,

weakly

plicate

on

the base only; truncation distinct laterally; tegulae very pale testaceous, impunctate.

Abdomen

obovate, without distinct hair bands, but the segmentsclothed with rather sparsepubescence;

apical margins of segments testaceous.

Wings

faintly yellowish;

anterior

wing

4.2

mm.

long; stigma

and

nervures pale testaceous;

third submarginal cell subquadrate, a little longer than the second

ART.19. A.MEKICAN BEES OF

THE GENUS HALICTUS SANDHOUSE.

13

on

the marginal; second submarginal higher than broad, receiving the first recurrent nervure quite near the apex. Legs dark, quite densely pubescent; knees

and

tarsi red.

Habitat.

—

Boulder, Colorado,

May

14 (Irene Bleasdale).

Ty'pe.—Ca.i. No. 26402, U.S.N.M.

Differs

from

lazulis Ellis

by

the darker ^color;

more weakly

punc- tured

meso

thorax;

smooth

clypeus

and

supraclypeal area; sculptur- ing of disk of

propodeum

distinct.

Distinguished

by

the very delicately punctured mesothorax,

and

the clypeus

and

supraclypeal area very flat

and

polished,

HALICTUS(CHLORALICTUS) ACTINOSUS,newspecies.

Female.

— ^About

^5.5-6

^mm.

^{long; golden or brassy green; pu-}

bescence yellowish white. Facial quadrangle about aslong as broad;

front

and

vertex very closelypunctured, the punctures

becoming more

scattered

on

thesides of theface; supraclypeal area

and upper

half of clypeus shining golden green with afew coarse punctures;

lowerhalf ofclypeus black; inner orbits converging below; antennae dark, the flagellum rufo-testaceous beneath.

Mesothorax

microscop- ically lineolate, very closely punctured; scutellum with deep punc- tures,

two

small polished spots on the disk; disk of

propodeum

coarsely granular withrather faint irregular rugae

making

a reticu- late surface, without an inclosing rim, but polished apically; mes- opleura irregularly punctured; truncation well defined laterally;

tegulae very pale testaceous, impunctate.

Abdomen

obovate, impunctate; the segments clothed with dense pubescence; apical marginsofsegments pale testaceous.

Wings

faintly yellowish; ante- rior

wing

4.5

mm.

long; stigma

and

nervures pale testaceous; second submarginal cell almost asbroad as long,

and

almost as long as the third

on

the marginal; third submarginal gently contracted above,

first recurrent nervure joining the second transverso-cubital; sub- costa very dark. Legs dark withyellowish pubescence.

Habitat.

—

California, labeled No. 846^; collector

and

exactlocality

unknown.

Type.—C^i.

No. 26403,

U.S.N.M.

Differs:

From

vegans Cockerell in having a broader head; paler tegulae

and

wings;

head and

thorax green; sculpturing of disk of

propodeum

distinct.

From

jloridanus Robertson

by

the broader head; ^clypeus

and

supraclypeal area distinctly brassy; paler hairs;

head and

thorax golden green; disk of

propodeum

not granular.

From

succinipennis Ellis

by

the broader head;

more

closely punc- tured head

and

thorax; shorter disk of

propodeum

with distinct sculpturing.

14 PROCEEDINGS

OF

THE

NATIONAX.

MUSEUM.

tol. Co.

HAUCTUS(CHLORALICTUS) LIGUANENSIS, newspecies.

Female.

— ^About

⁵

^mm.

^long;

^{head and}

^thorax

^ohve

^green;

^abdomen

black; pubescence rather short

and

dull white. Facial quadrangle longer than broad; orbitsconvergingslightlybelow; antennaeentirely dark, the flagellum hardly palerbeneath; face very delicately punc- tured, the punctures

more

scattered below

and

on the sides of the face;lowerhalf of clypeus shining black with a few punctures;

upper

halfofclypeus

and

supraclypeal arealineolate

and

sparsely punctured;

mandibles reddish.

Mesothorax

microscopically lineolate, delicately punctured,the punctures

more

scattered

on

thedisk;

median and

pa- rapsidal grooves distinct, but not deeply impressed; sculpturing of scutellum similar to that of the mesothorax,

two

polished spots on the disk; diskof

propodeum

withoutaninclosingrim,faintly tessellate with a few plicae at the base ofthe area; truncation distinct later- ally; tegulae reddish,impunctate.

Abdomen

obovate, shining, im- punctate; segments clothed with rather scant pubescence.

Wings

faintly dusky; anterior

wing

about3.5

mm.

long; stigma

andnervures

dark testaceous; second submarginal ^cell higher than broad, receiv- ing the first recurrent nervure near the apex; third submarginal a

little longer than second

on

marginal. Legs dark with yellowish hairs; knees

and

tarsi

somewhat

reddened.

Habitat.

— ^Liguanea

^{Plains, Jamaica,}

November-December

1911 (C.T. Brues).

Type.—CU.

No. 26404,

U.S.N.M.

Mrs. ElUs referred this specimen with

doubt

to jamaicae, but it

seems to be distinct.

Differs:

From

jamaicae Ellis

by

the darker tegulae; disk of pro-

podeum

notlineolate,

and

plicateat base only; scutellum with

two

polished spots

on

disk;face

more

sparselypunctured.

From

deceptor Ellis

by

the broader face; vertex with closer punc- tures; legs not entirely dark;

mesothorax more

sparselypunctured.

HALICTUS (CHLORALICTUS) ADMIRANDUS.newspecies.

Female.

— ^About

^5-5.5

^mm.

^long;

^{head and}

^thorax blue-green;

abdomen

black; pubescence white,rather dense. Facial quadrangle longer than broad; orbits converging below; antennae

brown-

ferruginous,

becoming

ferruginous at the

apex

of the flagellum; face covered with moderately close haii-s; front closely punctured, the punctures

more

sparse

on

the sides of the face; supraclypeal area

and

upper part of the clypeus blue-green, microscopically lineolate

and

^delicately punctured; lower half of clypeus shining black,with few coarse punctures; mandibles faintly reddish.

Thorax

quite denselypubescent;

mesothorax

dull,microscopically tessellate,with quite close but shallow punctures; punctation of scutellumsimilar to that of the mesothorax,

two

punctureless spots

on

the disk; disk