S. B. Buckley on North American Formiculse. 1G3 



serted in the base of the abdomen a little in front of the middle; scale 

 small, wedge-shaped and inclined towards the front; abdomen ovate; 

 upper surface of the thorax and abdomen sprinkled with hairs. 

 Bab. — Central Texas, in the ground near the surface. 



19. Formica picea, n. sp. 



Worker. Length 0.06 inch. — Head and abdomen pitchy-black, the 

 rest smoky-yellow ; head quadrangular, seen from above, its sides near- 

 ly straight; posterior angles slightly rounded and also its posterior 

 margin, which is also nearly straight; antennae long, clavate, inserted 

 near the base of the clypeus ; clypeus oval, with a small depression at 

 its base; eyes large, subcircular, prominent, and placed in the upper 

 surface of the head near the sides, about midway; mandibles small, 

 subti iangular and curved inwards ; prothorax narrower than the head, 

 rounded above, in front and at the sides, largest posteriorly; mesotho- 

 rax narrower than either the pro- or metathorax and slightly depress- 

 ed; metathorax raised, rounded and smooth above, subcompressed at 

 its sides, subtruncate ; pedicle short, and inserted in the base of the ab- 

 domen a little in front of the middle ; scale large, sub-wedge-shaped, 

 vertical; abdomen broad ovate, subobtuse, its upper surface thickly 

 sprinkled with hairs ; legs long, slender. 



Active ; dwells beneath rocks in the vicinity of Austin, Texas. Rare. 



20. Formica Lincecumii, n. ap. 



Female. Length 0.35 inch. — Black; wings of a reddish-brown color, 

 extending 0.12 inch beyond the abdomen, with one marginal, two sub- 

 marginal and one discoidal cell ; head a little narrower than the pro- 

 thorax, ovate, round at occiput and sides; antennae inserted at base of 

 the clypeus. long, filiform, and slightly enlarged towards their apical 

 joints ; eyes subeliptical, prominent, and placed near the top of the 

 posterior angles; a small channel extends from the base of the clypeus 

 to the occiput ; mandibles subtriangular and toothed on their inner 

 margins ; prothorax flattened at its sides, but little rounded at the top, 

 a broad band, thickly sprinkled with short white hairs, in front and ex- 

 tending around to the sides; mesothorax not depressed, as wide as the 

 prothorax; metathorax depressed, short aud subtruncate; pedicle short; 

 scale thin, wedge-shaped, vertical; abdomen large, round ovate, obtuse, 

 and thickly sprinkled with hairs posteriorly; legs short, slender. 



Worker. Length 0.20 inch. — Under side of thorax and legs spot- 

 ted with dark reddish-brown, black predominating; under surface of 

 head smooth and rounded; head one-fourth wider than the prothorax; 



