34 PBOCEEDINGS OF THE NATIONAL MUSKUM

ABT.13. ANTS

FROM HONDURAS AND

GITATEMAI.A

MANN.

35 triangular spines at sides a little in front ofmiddle. Mesoepinotal suture deeply impressed. Base of epinotum about equal in length to the declivity, its surface feebly convex above; spines slender, slightly curved upward, longer than their distance apart at base.

Petiolewith peduncle slenderand

much

longer thanthenode; node in profile a little longer than broad, rounded above. Postpetiole barelybroaderthanthe petioleand a little longerthan broad.

Shining throughout, petiole, postpetiole, gaster and appendages more thantheheadandthorax.

Head

withlarge,shallow, foveolate puncturesandfeebly reticulatedbetween,thoraxcoarsely reticulated, base of epinotum reticulated more finely than the thorax, with ir- regular, transverse,rugaeapically. Petiolnrpeduncle densely punc-

tateandsubopaque.

Mandibles with several fine long hail's near tips. Head, thorax, petiole, postpetiole and legs with short, semirecumbent stout hail's,

whichare most abundant on the head. Gaster with sparse, micro- scopicpubescence.

Color reddish brown, petiole, postpetiole and gaster black, legs lighter,withthe tibiae infuscated, especially apically.

Female.—

{deal?ited) Length4.10

mm.

Verysimilar to the worker, with the usual sexual differences.

Ti/pe^locality.

— Honduras

^:Progresso.

Coty'pe8.—C2it. 24455,U.S.N.M.

Described from several workers and one dealated female.

The

colony wasnestingin rottenwood.

The

movementsⁱⁿlife areslow, likemostofthe speciesofStrumigenys.

A. lemtus differs from A. ocellatusMayr, the only other

known

species in its darkercolor, the more distinct sculpture of the head and thorax andin havingthe occiput rather narrowly excised. In ocellatus thelatter is

more

broadly and roundly excavated.

STRUMIGENYS(STRUMIGENYS) LUDIA, new species.

Worker.

—

Length, including mandibles,2.90

mm.

(fig. 17).

Head

about one-fourth longer than broad, deeply and roundly excavated behind,occipital corners narrowl}^ rounded; sides infront of eyes biconvex, behind eyesfeeblyconvex. Mandiblesslightlyles;^

thanthree-fourthsaslongashead (fromoccipitalcornersto anterior border) nearly straight, of subequal width except at base and tip, with three slender apical teeth,the middle of whichisone-third as long as thebasal andterminal. Clypeustriangular, alittle broader thanlong,shallowly concave at anteriorborder, the median surface.

infront of middle,elevated into a low,roundedtubercle. Supraor- bital carinae straight, divergent, two-thirds as long as antennal scapes; scrobes broad and moderately concave. Antennal scapes very slender,extendingfour-fifths the distance to occipital corners

;

36

PROCEEDINGS OF

THE

NATIONAL.

MUSEUM.

vol.61.

first funicularjoint aslongas the second andthird joints together, joints 2-3 longer than broad; penultimate joint two and one-half timesas long as the third; terminal joint nearly as long asthe re-

mainder of funiculus.

Pronotum

flatinprofile,margined distinctly in front, less distinct at sides; broadest a little in front ofmiddle where the sides are obtusely angulate.

Mesonotum

submargined at sides. Mesoepinotal suture shallowly impressed. Base ofepinotum narrow, nearly twice aslong as the declivity; spines slender, longer than their distance apart at base, moderately divergent, directed ba^lvAvard and

upward

and slightly curved downward. Petiole in profile gradually rounding into the node, which is little elevated;

nodefromabove subquadrate, aboutaslongasbroad,withthe ante- rior cornersobtusely angulate. Postpetiole broader than long and about one and one-half times as broad as the peliole. Legslongandratherslender.

Subopaque, coarsely and granulosely punctate, more finely on gaster; the posterior portion of head, the pronotum and the base of gaster with longitudinal striae, straight on the gaster and irregularon thepronotum andhead.

Hairs short and curved on head, thorax and appendages, club-shaped on supraocular border, straight and elongate-claviform on gaster.

Fig.17.—STutiMiGExvs '"^pongiferous hairs well developed on posterior (Steumigenys) lu- margins of petiole and postpetiole and ventral DlAj NEW SPECIE.S. „. <: Xj-l 1 ij.

HEADOF WORKER. surfaceot thelatter.

Brownishyellow.

Type

locality.

—

Honduras: Cecilia.

Coti/pes.—Cat. No. 24456,U.S.N.M.

Describedfroma seriesofworkersfromacolony thatwasnesting inasmallpocketin a rotten log.

NearelongataRogerbutlarger,with longer mandibles,lessabrupt petiolarnode andentirely diiferent sculpture.

The

antennal scapes are

much

moreslenderthaninthe relatedimitator

Mayr

fromBrazil whichdiffers also inhaving the gastersmooth, exceptfor the short basalstriae,andshining.

STRUMIGENYS ELONGATARoffer.

Honduras: Ceiba,

San Juan

Pueblo, Cecilia, Progresso,Choloma.

Smallcolonieswerefoundinrottenwood.

The

workers havethe thorax densely punctate,andthepronotumislongitudinallycarinate atmiddle.

STRUMIGENYSBIOLLEYl Forel.

Honduras: Lombardia.

One

large colony in a rottenlog.

The

workers resemble those of Acanthognathuslenfus in general appearance.

ABT.13.

ANTS FROM HONDURAS AND

GUATEMAT.A

MANN.

87 STRUMIGENYS(STRUMIGENYS) EMERYI, new species.

]\'oi'ker.

—

Length, including mandibles. 2.10

mm.

(fi.s:. 18).

Head

about one-fourth longer than broad, posterior border con- yexly excised, occipital corners evenly rounded: sides ])Osterior of eyes nearly straight, in front of eyes feebly convex. Mandibles straight,ratherthick,morethan half aslongashead, with twolong terminal spines which have a shorter spine between them and one subapical spine, situated near the basal apical and about one-third itslength. Clypeusnearlyaslongas broad,narrowed behind,trun- cate at anterior border. Frontal carinae straight, divergent, bor- deringscrobes,three-fourths aslongas theheadand containingthe entire antennal scapes. Antennal scapes extending about three- fourths the distance to occipitalcorners; funiculus notvery slender, firstjointlongerthan the secondandthirdtogether,secondandthird joints about as broad as long.

Eye

slightly convex.

Pronotum

nearly fiat, humeri obtusely angulate. Mesoepinotal suture rather strongly impressed. Epinotal base fiat, longer than the declivity, spines shorter than their distance apart at base,

acute at tips, lamellate beneath, the lamellae con- tinuing as margins to the declivity. Petiolar peduncle slender, as long as the subglobose node which rises abruptly from it. Postpetiole oval, transverse, one-half broader than the petiole.

Legsslender.

Gaster anddorsum ofpostpetiole strongly shin-

ing and smoothexcept for short costae at base of fig. is.

—

strumi- gaster; head, thorax, and appendages moderately

l^^^l^ emeTyi.

shining. Mandibles densely punctate.

Head

ru- head of worker.

gosely punctate and with coarse, fine striae, longitudinal on front and becomingreticulate behind.

Thorax

finely punctate and more shining than head, with a median carina which is strong on the pronotum, weaker on the mesonotum; and irregular, longitudinal carinulae. Epinotal base shallowly punctate. Petiolar node rather coarsely punctate.

Sparse very long andfiexnous hairs, mingled withshorter curved hairsonthorax and

abdomen

and elongate,curved,clavatehairson head and antennal scapes. Spongiferous masses on posterior bor- dersandventral surfaces ofnodes.

Reddish

brown

_;gasterdarker than therest.

Female.

—

(dealated). Length2.50

mm.

Ocelli small. Mandibles shorterthan inworker. Epinotal spines thicker.

Sculpture similar to that of worker, but rather coarser; median carina of pronotum interrupted by impression between pronotum andscutellumbutextending length ofscutellum.

38

PROCEEDINGS OF

THE

NATIONAL.

MUSEUM.

vol.61.

Type-locality.

—

^{Honduras: Ceiba,} San

Juan

^Pueblo.

C

otypes.—C^ii.No. 24457,U.S.N.M.

Several smallcolonieswerefoundin rottenlogs.

Thisspecies approachesS. fiisca

Emery

but is

much

smaller,the head ismore narrowedin front andthe occipital incision narrower;

theclypeusis

much

longer.

The

straight mandiblesarelongerthan in loummiiae Roger and its varieties, from which emenji differs alsoin lackingthe very short,yquamiformhairs onthehead.

STRUMIGENYS CORDOVENSISMayr.

Honduras: Ceiba.

One

large colony of this beautiful species was found nesting in rotten wood.

STRUMIGENYSBREVICORNIS, new species.

Worker.

—

^{Length 1.50}

mm.

Head

elongate, narrowly concave at middle of posterior border;

sides convex posterior to eyes,very slightlyconvex and subparallel in frontofeyes. Mandibles less than half as long as head, rather slender and tapering, outer border shallowly concave in front of middle, inner border edentate basally. asmall though distincttooth in front of middle and several very fine, separated denticulae be- tweenthisandthetips. Clypeusslightlybroaderthanlong,rounded at anteriorborder. Antennalscapes lessthan half as long asliead, theupper border very shallowly concave, the inner border roundly expanded atmiddle; first funicularjoint as longas the second and third together, third joint a little shortei' than the first; terminal joint slightly longer than the remainder of funiculus.

Pronotum

nearly flat, margined in front, humeri rounded. Epinotal spines triangular, their width at base nearly as great as their length and their length a little shorter than their distance apart at base.

Petiolar node from above broader than long, very slightly broader behind than in front,with feebly convex sides and nearly straight anteriorborder; in profile a little shorter thanthe pedicel, rounded above and sloping in front. Postpetiole about twice as broad as petiole, excised at middle of posterior half.

Head,thorax,petioleandpostpetiole coarsely cribrate-punctateand nearly opaque. Caster shining and smooth except for short basal striae. Erect hairs elongate-clavate, sparse on head, thorax and abdomen; rurved,flattened hairsonelypealmargin.bor<lerofanten- nal scapes and tibiae andtarei. Ventral and posterior margins of postpetiolewith moderately well-developedspongiformhairs.

Pale reddish brown, gaster, except base, dark brown to black.

Female (dealated). Length 1.90

mm.

Epinotal spines broader, petiole node kss elevated and sloping

more

"-raduallv in frontandcolordarker than intheworker.

ABT. 13. ANTS

FROM HONDURAS AND GUATEMALA MANN.

39 Tijfe ^locality.

—

^{Honduras: Ceiba.}

Cotypes.—Q^^i. No. 24458,U.S.N.M.

Describedfrom one female andliveworkers.

This species is related to 8. crasslcomis

Mayr

from Southern Brazil, which differs in its longer epinotal spines, longitudinally ridged pronotum, more angulatelyexpandedantenna! scapes and in lacking (atleast in thespecimenbefore

Mayr)

thespongiformbrush on the postpetiole.

STRUMIGENYS ALBERTIForel.

Honduras:

San

Juan ^{Pueblo, Cecilia.}

The

first gastric segment of the workers in

my

^{series is} more strongly infuscated than in workers from Hayti and

Cuba

and one fromCosta Rica (collectionForel) butthespecimensseemotherwise thesame.

RHOPALOTHRJX (RHOPALOTHRIX) AMOENA. ^newspecies.

Worker.

—

^{Length 1.75}

mm.

Head,excludingthemandibles,alittlelonger than broad, shallowly andbroadly concave behind, posterior portions ofsides convex in- stead ofstraightlytruncateasusualintheotherspecies, anterior por- tionofsidesnearlystraightandsubparallel. Clypeusflat, distinctly broader thanlong, anterior border nearlystraight. Mandiblesslen- der, the outer border feebly concave at middle, tips slender,blades with eight triangular^teeth. Antennae7-jointed,scapesatbase about one-fourthasbroadaslong, thebasal corner rounded,firstfunicular joint slightlybroader thanlong and

much

broaderthan thesecond, joints 2-5 transverse, thethird and fourth more stronglythan the second and fifth; terminaljoint nearlyas long as the remainderof funicular. Eyesconvex. Pro-mesothoraxalittlelongerthanbroad, widest and rathernarrowly rounded at middle, surface feebly con- vex. jSIesoepinotalsuturedistinct. Baseofepinotumas longasthe declivity, slightly convex in front, flat behind. Epinotal spines strongly compressed, triangular, very feebly curved at tips, their bases extendingas lamellate margins to the declivity. Petiolarpe- duncle aboutaslongaswide,whichisflatabove, barely broaderthan long, withsides and corners rounded and anteriorborder straight.

Postpetiole twiceas broadas long and

more

than twiceasbroad as petiole, itssurfacenarrowlyexcised inback of middle.

Nearly opaque.

Head

and body coarsely cribately punctate, the head somewhat rugulose, especially in front. Mandibles and legs densely punctateandnotmoreshining thanthe rest.

Head

andbody (except epinotum) and appendageswithelongate, flattened-subappressed,whitishhairs. Head,thorax,andgaster beset withregular,verycoarse,club-shapedhairs.

20107—

22—

Proc.N.M.vol.61 16