106 
Psyche 
[August-OetoLer 
half as long as head, slender, acuminate. Antennal scapes 
slender basally, somewhat thickened at apical half, attaining 
occipital corners; first funicular joint thicker and scarcely shorter 
than the second, which is a little more than three times as long; 
as broad and subequal to the third, fourth joint two thirds as 
long as the terminal, which is subfusiform and pointed at tip. 
Eyes small, very convex, situated on lower margin of antennal 
fossa, well behind middle. Pronotum nearly flat, broadest in 
front, sides moderately arcuate, anterior angles with thick, 
blunt spines longer than broad, posterior angles with elevated, 
broad, lamellate triangular teeth, the bases of which continue as 
elevated side margins to the strongly sloping mesonotum. Epi- 
notum slender, the base shorter than the declivity and rounding 
into it, strongly margined at sides, the margins prominently ex- 
panded and angulate between basal and declivous portions, 
nearly parallel on the declivity, nearly convergent anteriorly on 
the base, making that portion from above triangular in shape 
and less than twice as long as broad. Petiolar peduncle slender, 
longer than the node ; node in profile with a rather concave dorsal 
surface, as long as the sloping anterior surface and much shorter 
than the posterior surface; from above transverse, prominently 
angulate at sides, subangulate in front, exposed posterior outline 
arcuate. Postpetiole nearly as broad as base of gaster and more 
than three times as broad as petiole, less than twice as broad as 
long, evenly convex above, anterior border straight, sides arcuate, 
posterior border in three subequal parts, the lateral lines feebly 
and the median distinctly emarginate. Legs long and rather 
slender. 
Exposed areas smooth and shining, dorsal surface with 
sparse, exceedingly long and flexuous hairs, mingled on the head 
and thorax with shorter, coarser and strongly curved erect 
hairs; legs with stiff, moderately long, curved, semirecumbent 
hairs. 
Pale brown, appendages lighter, gaster darker. 
Type locality. — Huachi, Beni, Bolivia. 
Cotype.— Cat. No. 29050 U. S. N. M. 
Described from a series of workers found by the writer 
beneath a stone. 
