PROCEEDINGS

Vol. XIX, ^{pp. 1} 15-120

September

6, 1906

PROCEEDINGS

OF THK

BIOLOGICAL SOCIETY OF WASHINGTON

_

^

DESCRIPTIONS OF SOME NEW FORMS OF OLIGOMY- ODIAN BIRDS.

BY ROBERT RIDGWAY.

Bypermission^oftheActing Secretary of the SmithsonianInstitution.

Coryphotriccus

^{gen. nov.}{Tyrannidx)^. Type,PilangusalbovilallusLawrence.

Similar to Pilangus but bill relatively

much

shorter

and

broader _(ex- posed

culmen

^{little if}_anylongerthantarsus

and much

le.ssthantwicethe width ofbillat frontalantiyo),

and

rictalbristles nuu-li weaker; ^still

more

closely related to Cmmpitts, butexposed

culmen

equal^toor slightlylonger than_tarsus,instead of

much

shorter.

{Kopv<pri,the

crown

; tpLkkos,a small bird.)

Todirostrum cinereum coloreum

subsp. nov.

Type, No. 33,350,

Am.

Mus. Nat. Hist., adult male,

Corumba,

^Matto-

grosso,southwesternBrazil,

March

_17, 1886; H. H.Smith.

Similar to T. clneretuacinereum (Linnseus) but_larger, back

more

exten- sively

and

clearlyolive-green (thehindneck sometimesolive-green),^{v^^hite} tips to rectrices

more

extensive,yellow of under_{parts brighter,}

and

_yellow margins^togreater wing-coverts

and

inner secondaries_paler.

Southwestern Brazil (Province of Mattogrosso.)

Atalotriccus pilaris venezuelensis subsp. nov.

Type, No. _73,454, adult male,

Am.

Mus.Nat. _Hist.; San Antonio, Ber- nuidez,Venezuela,July15, 1896;

W.

H. Phelps.

Similarto .1.]>ilaris ])ilarisbut_larger

and

coloration darker, with pileum decidedly darker

and

duller in colorthanback.

Venezuela.

Rhynchocyclus

klagesi sp.nov.

Type, No.75,587,

Am.

Mus.Nat. _Hist.,adult female,Maripa, Venezuela,

May

^{9,1901; S.}

^M.

^Klages.

Similar to E. sulphurescens (Spix) but

much

smaller

and

coloration slightlydarker; wing, 52^{; tail,}44;exposed culmen,^{1 1;} tarsus, 15;middle

toe,^8.

Venezuela(Maripa).

26—Proc. Biol. Soc. Wash., ^Vol..XIX, ^{1906. (115)}

116 Ridgivay —

_Neiv

_Forms

of

Oligomyodkin

^Birds.

This bird

may

possiblybe the

same

asR.((ssiinllisPelzeln (Orn.Bras.,

ii Abtli., 1869, 181), from

Engenho

^de

Gama,

^San Vicente, Borlja, Rio Negro,

and

_Barra, northern_Brazil,but withoutaspecimen^{of thelatter for} comparison^itisimpossible^tobesurewhetherthetwoareidenticalornot.

Mionectes

olivaceus venezuelensis subsp. nov.

Type, No. _70,345,

Am.

^NIus.Nat._Hist., adult female, Guacharo, Vene- zuela,

December

_14, 1898; F.

W.

Urich.

Similarto ^f. olivaceus olivaceus,of Costa Rica

and Panama,

but _larger (adult femaleaveragingwing67.8,tail 52.5, exposed

eulmen

13.5,instead of_63.3,45.9,

and

12.5 respectively),

and

throat

more

_broadly

and more

distinctlystreaked.

Venezuela.

Elsenia frantzii

stolzmanni

subsp. nov.

Type,No._88,441,U.S.Nat. Mus.,adult female, Tambillo,northern _Peru, September^{11,1877; F.}Stolzmann.

SimilartoE.frantzii frantziibutupjier partsbrowner

and

_.slightlydarker

and

under _parts

much more

_{strongly yellowish (al)domen}

and median

portion of breastbetweenstrawyellow

and

_{sulphuryellow).}

NorthernPeru(Tambillo).

Although ^identified

by

^{Count von} Berlepsch ^asE. obscura (Lafresnaye

and

D'Orbigny), thespecimen mentioned above^isvery^differentfrom

any

ofthe severalspecimens^ofthatspecies intheNational

Museum

collection

and

is

much

nearer E.frantzii. It isveryslightly larger than

any

^female of thelatteroftheseriesmeasuredin length of wing

and

tail,

which

are 81

and

_72.5,respectively,the

maximum

of E._{frantzii (thirteen} females) being^80.5

and

71.

Myiarchus

ferox actiosus subsp. nov.

Type,No._198,632,U.S. Nat. Mus., adultmale; Pigres, at

mouth

ofGulf of Nicoya, Costa Rica,

March

_6, 1905; R.Ridgway.

Similarto.U.feroxpanamensis(Lawrence) but^colorof back,etc.,darker

and

duller olive,hindneck,^sidesof neck,

and

sidesofheadpurer gray,

and

yellow ofunder_partspaler; still

more

like _^f.f.plucocephalus(Sclater),of western Ecuador,

and

scarcely tobedistinguishedexcejit for paleryellow ofunder_parts.

Pacificcoast of Costa Rica.

Megarynchus

pitangua caniceps subsp. nov.

Type, No. _126,595,U.S.Nat. Mus.,male _ad.,BarrancaVeltran, southern Jalisco,

March

25,1892; P. L.Jouy.

Similarto

M.

_pitanguamexicanus but pileum sootygray^ordeep

mouse

gray instead ofblackish,

and

colorof back,etc.,

much

_grayerolive.

"WesternMexico.

Ridgivay — _{New Forms}

_of

Oligomyodian

^Birds.

117

Pipra erythrocephala berlepschi siibsp.nov.

Ti/pf, No. _147,568, U.S. Nat. Mas., Nauta, northeastern Peru, Dec. ^S 1883; T.Hauxwell.

SimilartoP. erytlirocephala ertithrocephalabut yellow^of head

and

neck

mneh

_{lighter (bright}

chrome

instead of

cadmium

yellow or orange)

and

usuallywithout

any

^redposteriormargin^;wingaveragingdecidedly longer

and

bill slightly smaller.

(Wing

^{of adult}

male

_averaging59.C; exposed culmen,8.9.)*

EasternEcuador to central Colombia(Bogota), northeastern Peru,

and

lower

Amazon

Valley.

Count von _Berlepsch has_longago^{calledattentiontothe}differences pre- sented

by

^birdsofthis speciesfromeastern

Ecuador

ontheone

hand and

those from northeastern Colombia (Bucaramanga)

and

Venezuela on the other (Journ.^fiirOrn., 1884, 304, 305). Ifind the differences mentioned

by him

entirelyconstantinaseriesofnine adultmales fromtheRio Napo, easternEcuador,

and

twofromNauta, northeastern Peru,^as

compared

^with ten adult males from

Cayenne and

^{BritishGuiana,ten} from Venezuela, nine from Trinidad,

and

six from northern Colombia. Specimens from Bogota,^centralColombia,are, asmight be expected fromgeographical con- siderations,intermediate, but are decidedly nearer^totheupper

Amazon

form.

A

_singlespecimen from Para,onthe lower

Amazon,

agrees with^P.e.

berleparliiincolorationbutisverysmall,the

wing

measuring only 52

mm.

whiletheshortest

wing

^{intheseries of eleven} specimens from ^theupper

Amazon

measures_56.5,the longest^61.5

mm.

Pipra pipra bahiae subsp. nov.

Type,No._115,147,U. S.Nat. Mus., adult male, Bahia,^{s. e.Brazil;C.}

H.

Townsend and

T.Lee.

SimilartoP.pipra pipra but adultmale with underpartsof body,posterior to_che.st,dullslate-blackorblackishslateinstead of intense blue-black,

and

black of other portions^lessintense

and much

lessbluish orviolaceous.

Southeastern Brazil.

Pipra pipra anthracina subsp. nov.

Type,No. _108,278,U.S.Nat. Mus., adult male,Moravia,Costa Rica, Oct.

30,1885;

Juan

_Cooper.

SimilartoP. pipra pipra,^ ofCayenne,^BritishGuiana,

and

Venezuela,but

wing

decidelyshorter,^bill smaller,black color of adult male

much

less lustrous(deep velvet oropaqueblack instead of glossyblue-black),

and

under tail-covertstippedwith_grayish.

Panama and

southernCosta Rica.

*Eleven specimens. Thirty^-liveadultmalesof P.e.erythrncephala average: Wing, 57.9; exposed culmen,^9.5.

i[Parus] pipraLinnseus, Syst. Nat., ed.10, i, 175S, 190. Pipra ^{leucociUa Linnaeus,} Mus.Frid.Adolph.Regis.,ii,1764, 32: Syst.Nat., ed.12,i,176G,^3-10. [Pipra] leucocapilla Gmelin,Syst.Nat.,i,pt.ii,1788, 1002.

118

_BirJgvcn/

— _{New Forms}

of

Oligomyodian

^Birds.

More

_{closelyresemblingP. p.}eorucina*in coloration,but the l)l;ick de- cidedly^lessbluish

and

^size

much

less.

Scotothorus olivaceus sjx nov.

Tijpf, No. _75,520,

Am.

Mas. N. II.,adult female, Rio Mato, Venezuela, Jan.25, 1901; ^S. M._Klages.

Most

_{nearlyresembling}S. rosenbergi (Hartert) of northern Ecuador, but

much

lighter in color throughout (above ^clear olive,thewings

and

tail sepiabrown, beneathlight olive,tinged with pale yellow, the throat tinged withbufl"),

and

with _wing,tail,

and

taisus decidedly longer (wing88,^tail 62, tarsus22mm.).

Venezuela.

Scotothorus furvus _sp. nov.

Ti/pe, No. _62,070, U.S.Nat. Mus., adult male, Boquete de Chitra,Ver- agua,

Panama,

1869; E. Arce.

Most

like S. rosenbergi, but

much

darker

and more

uniform in color (decidedly the darkest

member

of the genus), theupperpartsdark olive-

brown

or _bister,under_partsnearlyuniform deej) olive (moregrayish on undertail-coverts), ^bill

much

_larger

and

tail

much

_longer; also

somewhat

resemblingS. irallaciiSclater

and

Salvin,but very

much

darker _tlirough- out (es})eciallyon lowerparts),^bill

much

larger,andtail relatively longer (wing89.5, tail 66.5,exposed

culmen

16mm.).

Pacificslope ofwestern

Panama.

Attila tephrocephala sp.nov.

Ti/pr,No._04,624, \J. S.Nat. Mus., adult female,Talamanca,Costa Rica;

Jos6C. Zeledon. (Collector'sNo.4'42.)

Somewhat

likethe grayer ^or

more

olivaceousexamples^{of^1.}cltrenpyga cilreopyga but pileum brownish _slate-gray or

mouse

_gray,lower _throat, chest

and

sides of breast uniform _light

mouse

_{gray or} olive-gray, throat with fewer

and

less distinct

dusky

streaks, and_largerwing-coverts

much

lessdistinctlytipped with brown.

Southeastern Costa Rica (Talamanca).

Attiia citropyga salvini subsp. nov.

Ttipr,No. _177,.%8,U.S.Nat. _IMus., adult male,Pasa Nueva, Vera Cruz, Mexico,

March

_23, 1901; A. E.Colburn.

SimilartoA.c.cilreopyga,of Nicaragua, Costa Rica,

and Panama,

^{but de-} cidedly browner above(thepileum

and

hindneck neverolivaceous),rum])

and

_uppertail-covertsochraceous instead of_lightchrome,naples,ormaize yellow, ^tail

more cinnamomeous

ortawny,

and

size averaging decidedly larger.

Southeastern

Mexico

toHonduras.

Thisis the form _usually

known _by

the

name

AUila ciircofiygin (Bona- parte); butthe type of the^latter

came

from_Nicaragua,

and

thereforebe-

*Piinacoracina Sclater, Proc. Zool. Soc.Lond.,1856,29 (Bogotd,Colombia).

P

_[ipra]

leucocillacoracina BorlepscliandIlarteit,Novit.Zool., ix,April,1902,.'J3,inicxl.—Pipra leucocitlacoracina Ilelhnayr,Ibis,l'JC(),26 (monogr.).

Rulguaji — _{New Forms}

_of

OUgomyodian

^{Birds. Ill)}

longs^tothe southernform

known

asA.sdatcriLawrence, ^thelatter

name

being ^a

synomyni

^of.1.dtrcnpi/gn.

Attila citreopyga luteola subsp. nov.

Ti/pc,No._64,G23,U. S.Nat. Mas., adult male, San_Jose,Costa Rica; Jose C.Zeledon. (Collectoi-'sNo. 247.)

Similarto.-1.dtreopygn c'mnamotaea, of western Mexico, but decidedly smaller,

rump ^and

uppertail-covertsyellow instead of ochraceous,

and

an- terior under _parts

much

less distinctly streaked. Differing from A.c.

cUrenpiign in

much

_lighter

and more cinnamomeous

colorof back,scajiulars,

and

tail

and much

lessdistinctlystreaked throat

and

chest.

Pacificslope of CostaRica

and

_Nicaragua.

Tityra semifasciata

columbiana

subsp. nov.

Type,No._170,410,U.S.Nat. Mus., adult female,

La

Concepcion, Santa Marta, Colombia,April6, 1899;

W. W.

_Brown,Jr.

Similarto 7'.ntnnifitsfiiatasemifa^ciatiibutadultmalewith forehead

much

lessextensively^black,

and

adultfemale

much

darkerabove, with back

and

scapularslightgrayish

brown

_(insteadofbrownish gray ^topuregray)

and

pileumdeepgrayish

brown

(instead of light grayish

brown

or brownish gray).

Northern Colombia_(SantaMartadistrict';.

Tityra semifasciata costaricensis subsp. nov.

Type, No. _199,039, U. S. Nat. Mus., adult female, Bonilla, Costa Rica (Atlantic slope),

March

_29,1905; AnastasioAlfaro.

Similarto T.s.columbiana_(theadultmale_scarcelyifatalldistinguishable) butusually with black areaoninner

web

oflateral rectrices

more

exten- sive; adultfemale

much

darker

and

_browner,theback

and

scapularsdeep grayish brown, pileum

and

auricular region darker _grayish brown,

ami rump

^darkergray^; slightlysmaller

(Panama

specimensdecidedlyso).

Panama

tosouthern

Honduras

(Rio Segovia).

Although Dr. Sclater

and

Messrs. Sclater

and

Salvin profess their in- ability to distinguish the birds of this species from

Mexico and

Centi'al America from those ofSouth America,^and'consequently ^unite

them

all

under the

name

_Tityra semifasciata, examination of a splendid ^series (several

hundred

_specimens)shows _clearlythat in reality the _species is easily divisible into severalwell-defined geographicforms, ofwhichI

am

abletocharacterizethe following^:

1. Tityra semifasciata semifasciata (Spix). Southern_Brazil,etc.,tocentral Colombia_(Bogota).

2. Tityra semifasciata columbiana Ridgway. Northern Colombia_(Santa Martadistrict).

3. Tityra semifasciata costaricensisRidgway.

Panama

^to southern

Hon-

duras.

(Panama

specimens ^are intermediatein coloration between the typical ^biril fromCosta _Rica,Nicaragua,

and

southern

Honduras

on the one

hand and

Santa Marta examples (7". ^s.columbiana) on the other, but are decidedly smallerthan thelatter

and

onthe whole nearer theformer in coloration).

120 Rldgwuii — _{New Forms}

of

Oligomyodian

^Birds.

4. Tltyra semifasr.iaiapersonata (Jardine

and

_Selby). Central

Honduras

to easternMexico. (Thisformisdecidedlylargerthaneitherofthe preceding, has the adult maledecidedlydeeper gray (especially

on

_upper parts),the adult femalemost resembling^thatof7\s.coMaricen.<<isfrom

Panama

but with the general^colorofupperpartsbrowner

and

colorofpileumscarcely ^ifat all darker than that of back.) Specimens from Yucatan ^are decidedlj' smaller

and somewhat

_paler,the femalesaveraging^still

more brown

above

and may

require separation.

5. TiU/ra semifusc.iata griseiceps (Ridgway). Western Mexico. _(Adult malesofthisformare scarcely^ifatalldifferent incoloration fromthose of T.s.personata,

some

_specimensofthelatterfrom

Honduras

_{beingprecisely}

similar,but average slightlydeeper graj^especially on the rump, upper tail-coverts

and

hinder_{part ofpileum,}whicharepracticallyuniform with theback; butthe adultfemales areexceedinglydifferent,beingeven_paler

and

_grayerthanthose ofT.s.semifasciata,with thepileumpaler

and

_grayer

tlian the back instead of the reverse. Decidedly ^the largest form,^T.s.

perwnata,

coming

^nextinsize.)

I

am

notatall sure that it would not be best in accordance with the facts to separate, asadditional subspecies, notonly^the

Yucatan

birds (from T. s.]>ersonala.) butalsothe

Panama

birds (from ^T.,s.costaricensis);

and

it isnot unlikely the South

American

birds

may

in reality include one or

more

_subspeciesinadditiontothose designated above.

Platypsaris aglaise yucatanensis subsp. nov.

Type,No. _130,02:^,U. S.Nat. Mus., adult

male

; Yucatan; G.F.

Gaumer.

Similar in colorationto P. _{aglaiie aglaix,}of northeastern Mexico, but smaller, with _{relatively larger} bill(wing averaging ^{87.2 in} male,^{86.8 in} female, exposed

culmen

17.2 in male, ^{17.4 in} female, thecorresponding average measurements ^{of P.a.}aglaix being:

Wing

^{94.8 in} male,^{93.9 in} female; exposed

culmen

16.3in male, ^{16.6 in}female).

Yucatan.

Lathria unirufa clara subsp. nov.

Type, No._53,767,

U.S.Nat.

Mus., adult male;

Panama

_(Lion Hill sta- tion_?); J.

McLeannan.

SimilartoL. unirufa unirufa(ofsoutheastern

Mexico

toGuatemala) but general colorationdecidedly^cleareror_brighter,inclining^todullcinnamon- rufous above, theunderparts cleartawny-ochraceous; averaging decidedly smaller.

Nicaragua^tonorthern Colombia.

Lathria fusco=cinerea guayaquilensissubsp. nov.

Type,No. _101,27!,U.S.Nat. Mus., adult; Guayaquil, western Ecuador, 1884; Dr.

Wm.

H.Jones, U.S. N.

SimilartoL. fusco-cinereafusco-cinerea(Lafresnaye),^ofColombia, butgray of under _parts

much more

_{strongly tinged with buffy} olive,under tail- coverts

much

_browner,

and

_{remigesdarker;} slightly smaller.

Western Ecuador.