14 
Psyche 
[February 
joints submoniliform. Thorax long, slender and flattened; 
mesoepinotum compressed laterally; promesonotal impression 
strong; mesoepinotal impression obsolete. Epinotum unarmed. 
Petiole subcylindrical, not pedunculate. Postpetiole shorter and 
broader than the petiole. Gaster long and slender, the three 
segments visible from above separated by strong constrictions. 
Legs, long spines of anterior tibise very strongly pectinate, those 
of middle tibise small, of the posterior pair moderately pectinate. 
Claws simple. 
Genotype. — Leptanilloides hiconstricta^ new species. 
Leptanilloides biconstricta sp. nov. (Fig. 1) 
Worker . — Length 1.80-2 mm. 
Head subquadrate, very slightly narrowed behind, more 
than twice as long as broad, sides nearly straight and 
parallel; occipital corners rounded, border feebly concave. 
Mandibles slender; their blades edentate. Anterior border of 
clypeus straight. Antennse stout, scapes clavate, extending 
about three-eighths the distance to occipital borders; first funic- 
ular joint rounded, broader and longer than the second; joints 
2-10 slightly transverse, gradually increasing in size toward 
apex; terminal joint about as long as the two preceding together. 
Thorax and epinotum elongate, slender, flat above; pronotum 
from above broadest at humeri, with sides feebly convex; mesoG 
pinotum seen from above, quadrate, two and a half times as 
long as broad, with nearly straight sides; epinotal declivity 
very short and rounding into the basal portion. Petiolar node 
from above a little longer and two-thirds as broad as the post 
petiole, very slightly narrowed from front to rear and with 
straight sides; in profile slightly convex above, the ventral 
outline convex at anterior half and concave behind, projected 
anteriorly as a blunt cone. Postpetiole in profile rather strongly 
convex beneath, feebly above; from above a little longer than 
broad, feebly broadened from front to rear, with straight anterior 
and posterior borders and nearly straight sides. First gastric 
