S. B. Buckley on North American Formicidse. 349 



middle and curved inwards, with five teeth in the truncated inner api- 

 cal margins; prothorax narrower than the head, compressed and round- 

 ed above; divisions of the thorax not strongly marked; metathorax 

 has two short spines near its base; pedicle long; scales nodose, poste- 

 rior one the largest; abdomen small, round-ovate ; legs long and slen- 

 der, the whole ant thickly sprinkled with short, gray hairs. 



Is slow in its movements. Has homes in the ground in Northern 

 Texas at a depth not known. 



65. (Ecodoma tardigrada, n. sp. 



Female. Length 0.21 inch. — Widened and curved, narrowed ante- 

 riorly; inner margin of mandibles finely toothed; head about equal in 

 width to the prothorax ; ocelli near the vertex of the occiput; mesothorax 

 higher than the prothorax; abdomen short, broad ovate; legs slender 

 and short ; wings extend nearly a line beyond the abdomen ; the whole 

 body finely corrugated, and thickly sprinkled with short hairs, and with 

 fewer spines than the worker; otherwise like the worker. 



Male. Length 0.17 inch. — Head small, narrower than the protho- 

 rax ; eyes large, prominent in front, near the base of the mandibles, a 

 slight depression between the meso- and metathorax : abdomen small, 

 round-ovate; otherwise like the female. 



Worker. Length 0.21 inch. — Chestnut-brown or reddish-brown; 

 head subtriangular ; occiput subemarginate ; two carinas diverge back 

 from the clypeus to the occiput, the space between them being nearly 

 in the same plane, and depressed backwards ; flagellum of antenna? 

 clavate, its joints short ; eyes small, black, circular, and placed in the 

 anterior part of the head ; under surface of the head has a broad de- 

 pression beneath the occiput ; mandibles slender, curved inwards, 

 sharp and toothless ; thorax narrower than the head, corrugated and 

 spinous, having eight or more short spines; mesothorax strangulated; 

 pedicle long; scales nodose, posterior one the largest; abdomen sub- 

 ovate, obtuse; legs long and slender; whole ant rough and corrugated. 



Lives in the ground, descending to its cells, two or three feet beneath 

 the surface, by a hole about half an inch in diameter. It has a vegetable 

 paste in some of its chambers which is probably used as food during 

 inclement weather. It is slow and deliberate in its movements, and 

 throws the excavated dirt in the form of crater. 



Dwells in Central Texas, and is not uncommon. 



66. Oecodoma (Atta) arborea. n. ap. 



Worker. Length 0.22 inch. — Head, thorax and legs reddish-brown ; 

 abdomen black; head sub-quadrate, with its sides slightly rounded; 



