44 
Clark — A iiAimikin Formicidae. 
Su])-fann]y: CERAPACHYINAE. 
Eusphinctus (Nothosphinctiis) nigricans n.sp. (PI, VI, 1.) 
Worker'. Length 5 — 5 8mm. 
Black; antennae and legs ])rownisli. Hairs yellowisli, long, 
sub-erect, longer and more numerous on the gaster than else'where, 
short and adj)ressed on the antennae and legs. Pubescence yellow- 
isli, s})urse througliout excej)t on the antennae and legs, and more 
abundant on the head than on the gaster. 
Shining. Head finely and densely punctete, mandibh's 
coarsely ])unetate and feebly striate, Pronotum and mesonotum 
■coarsely and sparsely punctate; epinotum more densely and hnely 
punctate. Petiole and anterior half of the postpetiole coarsely 
and sparsely punctate; anterior half of the abdominal segmeiits 
finely and sparsely punctate. 
Head longer than broad, as broad in front as behind, Avidely 
■concave on the occipital border, the angles sharp, sides nearly 
straight. Frontal carinae short, erect, truncate and conliuent 
behind, extending bac'k to the toj) of the antennal depression. 
Carinae of the cheeks short, j)romiiient. Clypeus very short and 
broadly rounded. Eyes ajid ocelli absent. Mandibles abruptly 
bent at their base, indistinctly dentate. Antennae robust, scapes 
extending back beyond the middle of the head; first joint of the 
funiculus as long as broad, second to ninth broader than long, 
tenth longer than broad, the apical joint as long as the three pre- 
ceding joints together. Thoiax one and three-quarters times longer 
than broa<l, slightly broader through the pronotum than through 
the epinotum, slightly constricted in the inesomtal i'egio?i; 
mesonotal sutures feebly indicated; pronotum rounded in front and 
on the sides, the anterior angles bluntly pointed; epinotal decliAaty 
abrupt, concave, marginate on tlio top, siibmarginate on the sides. 
Node of the petiole fully one and one-quarter times broader than 
long^ broader behind than in fi*ont, the anterior l^order nearly 
straight, the sides feebly convex, the posterior border Avidely, but 
not deeply, concave; in profile slightly higher than long, the 
anterior fjice vertical, the dorsum is strongly rounded and convex 
above; the ventral surface in front with a long broad, blunt, 
tooth-like i)rojoction directed slightly backward; there is also 
a small sharp tooth at the jiosterior end of the ventral surface. 
Postpetiole one and one-quarter times broader than long, broader 
behind than in front, all four borders feebly convex; the ventral 
surface in front feebly produced and Avith a short blunt tooth-like 
projection. All tlie segments of the abdomen separated by wide, 
deep constrictions; the first segment is twice as broad as long. 
