S. B. Buckley on North American Formicidse. 1G9 



ed inwards, and with three small teeth near the apex, which are not 

 seen without a good lens; epistoma depressed; antennae inserted in 

 front, filiform; thorax wider than the head, rounded above, its divi- 

 sions obscure; pedicle short, and inserted in the base of the abdomen 

 a little in front of the middle; scale small, inclined forwards and 

 wedge-shaped; abdomen large, broad-ovate; head, thorax and abdo- 

 men somewhat thickly sprinkled with short grey hairs; legs slender 

 and of medium length. 



Male. Length 0.08 inch. — Head a little wider than the thorax; 

 abdomen ovate, small ; otherwise like the female. Winged males and 

 females captured in March. 



Worker. Length 0.08 inch. — Color: upper surface of head, thorax 

 and abdomen dark brown ; under surface of the head, thorax and ab- 

 domen, also the pedicle, scale and legs pale yellow; head but little 

 wider than the thorax; mesothorax depressed; abdomen ovate; other- 

 wise like the female. 



Hab. — Austin. Texas. Bare. Has cells in the ground near the 

 surface. It is very active. 



29. Formica (Tapinoma) Wichita, n. sp. 



Length 0.10 inch. — Upper surface of head, thorax and abdomen 

 jet-black and shining ; legs, under surface of thorax, antennae and 

 mouth pale yellow ; head broad-ovate, round above, at sides and be- 

 hind, not emarginate; antennae long, filiform, inserted at base of the 

 clypeus ; clypeus sub-curved, smooth ; eyes rather large, prominent, 

 sub-circular, lateral, placed about midway of the head; mandibles 

 shorter than the labrum, very small, curved in and acute; under sur- 

 face of the head not sinuate; prothorax one-third narrower than the 

 head, round at sides, in front, above, and widest in the middle; meso- 

 thorax depressed, and a deep strangulation between it and the rneta- 

 thorax ; metathorax widened and raised posteriorly, rounded above; 

 pedicle inserted in the base of the abdomen a little in front of the mid- 

 dle; scale large, vertical, wedge-shaped; abdomen broad-ovate, obtuse; 

 legs long; coxae and trochanters large, a few scatteriug white hairs on 

 the upper surface of the head and abdomen. 



Hab. — Beneath stones near the Wichita Biver in Northern Texas. 



30. Formica (Hypochira) subspinosa, n. sp. 



Worker. Length 0.18 inch. — Yellowish-red; abdomen reddish- 

 brown, smooth throughout; head sub-cordate, rounded above; occiput 

 slightly emarginate, posterior angles rounded; eyes large, circular, 

 placed a little in front of the middle on the upper surface of the round- 



I'ROCEEDIXGS E*T. SOC. PHILAD. JULY, 1866. 



