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 mesoépinotal 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 more 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) championi Forel var. ornatus, 
var. nov. 
Worker. Length 6 mm. 
Near germaint. 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. ger- 
maint. 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- 
tinetly longer than broad, the first three times, the others about twice. 
Pronotum flattened, a little longer than broad, the sides rounded in 
