214 [May 



and under surface yellowish-white; mouth, the apices and inner edges of 

 the mandibles light brown ; antennae pale yellow. 



Worker. Head oval somewhat egg-shaped in outline seen from above, 

 narrowing in front, convex and smooth above, slightly hairy posteriorly, 

 somewhat depressed, rounded and projecting a little over the thorax; front 

 raised, the back portion of the elevation triangular and depressed ; episto- 

 ma rounded above and protruding slightly in front, eyes large, convex, 

 brownish-black, placed in front midway between the lower side and the 

 top near the base of the antennae ; antennae clavate, 13-jointed, hairy, first 

 and second joint longer than the third, succeeding joints nearly equal, un- 

 der surface of the head has a sinus extending back from the mentum, la- 

 bial palpi small, clavate, maxillary palpi geniculate, clavate, the apical joint 

 longest, mandibles 3-toothed, two sharp teeth at the point with a furrow 

 between their bases, caused by the extension of the teeth into elevations 

 on the mandibles, the other tooth near the middle, short, with a broad base 

 affording a long cutting surface, outer edge of the mandible curved ; tho- 

 rax slightly hairy, semicircular, narrower than either the head or abdomen; 

 trochanters and femurs smooth with a very few scattering hairs, lower part 

 of the tibia and all of the tarsi hairy, claws light brown ; abdomen egg- 

 shaped, slightly compressed above and below, smooth, sparsely hairy. 



Length 0.16, head 0.04, 0, 08 inch. 



Soldier. AntenniB 11-jointed, first joint longest, the next a little short- 

 er and the third still shorter, remaining joints nearly equal and somewhat 

 egg-shaped, mandibles smooth, sharp pointed and crossing near their apices, 

 light brown about one-third of their length near the base, the remainder 

 dark brown, a small tooth about midway on the inner margin ; head oval, 

 smooth above, a little hairy in front, rounded back and extending slightly 

 over the thorax, the under suaface has a deep sinus posteriorly ; there are 

 two light brown spots (eyes?) in front, one just above the base of each an- 

 tenna; thorax, abdomen and legs similar to those of the worker. Length 

 0.14, head including mandibles 0.08, mandibles 0.04. 



Female? Head above pale yellow, beneath, thorax, margins and sides 

 of the abdomen and legs white, the remainder of the abdomen ash-colored 

 or a dirty white, mouth and mandibles light brown, mandibles triangular, 

 3-toothed, teeth smaller and sharper than those of the worker, ocelli near 

 the middle of the sides of the head, eye» in front above and anterior to 

 the base of the autennai; front prominent, raised and slightly hairy; po.s- 

 terior part of the head rather flat at top, rounded backwards but not pro- 

 jecting over the thorax, smooth ; thorax subcylindrical, upper side covered 



