466 bulletin: museum of comparative zoology. 



long and slender, the scape extending one third its length past the 

 occiput, funicular joints 1-7 subequal, cylindrical, nearly three times 

 as long as broad, joints 8-11 a little thicker than the others, apical 

 joint as long as the two succeeding joints together. Pronotum flat, 

 behind, sloping in front, the anterior part considerably narrowed, 

 with margined sides; border between anterior and posterior parts 

 angulate. Mesothorax in front flattened, disc-like; behind sloping 

 into the broad mesoepinotal impression; the mesothoracic spiracles 

 are large and form distinct tubercles. Base of epinotum longer 

 than the declivity, the surface two and a half times as long as broad, 

 flat and narrowest in front, broadly, shallowly impressed behind, 

 the impressed part acutely margined; posterior border margined, the 

 two margins joining in a prominent, rounded angle; face of declivity 

 rounded. Petiolar node thick, in profile very convex in front, nearly 

 straight behind, the two surfaces separated by a faint margin; the 

 anterior surface rounded, the posterior nearly flat. Gaster elongate 

 and narrower than is usual in the genus. Legs long and slender. 



Head, thorax, epinotum, and gaster subshining; seriolately punctu- 

 late, devoid of pubescence but bearing sparse, long, erect hairs. 

 Antennae with moi'e abundant and finer, semierect, recumbent pile. 

 Legs finely pilose. 



Gaster shining, with sparse, long, erect hairs. 



Color light ferruginous, except the gaster, which is piceous. 



Described from a single worker taken at Itacoatiara. It is related 

 to D. lutosus, but is a more slender species, the epinotal margin is 

 distinctly concave seen from behind, and the head is much longer, 

 with very convex sides, and narrowed behind, and not concave at the 

 border. 



170. Dolichoderus {Hypoclinea) chmyipioni Forel var. ornatus, 



var. nov. 



Worker. Length 6 mm. 



Near germaini. Head elongate oval, with convex sides and feebly 

 concave occipital border, the angles evenly rounded. Clypeus flat- 

 tened at middle, anterior border straight. Mandibles as in D. (jcr- 

 maini. Eyes nearly circular, located at sides of front anterior to 

 middle of head. Antennae slender, the scape bisinuate, extending 

 one third its length past the occipital border; funicular joints all dis- 

 tinctly longer than broad, the first three times, the others about twice. 

 Pronotum flattened, a little longer than broad, the sides rounded in 



