S. B. Buckley on North American Formicidx. 153 



least 200 species within the United States, a large portion of which 

 still remain undescribed. We think Texas alone .contains more than 

 100 species. 



1. Formica Nova Anglae, n. sp. 



Female. Length 0.32 inch. — Wings extend about a line beyond 

 the abdomen, and have one marginal, two sub-marginal and one discoidal 

 cells ; head subquadrate, slightly rounded above, occiput emarginate, 

 with its posterior angles rounded ; eyes rather small, circular, placed 

 near the sides and near the occiput; antennae rather short, slightly 

 clavate, inserted a little in front of the vertex ; mandibles enlarged in 

 front, curved inwards, toothed, apical tooth long and acute, inner 

 margins tinged with black; clypeus subcarinated, under surface of the 

 head rounded, with a very slight, longitudinal depression; prothorax 

 nearly equal in width to the head, rounded, smooth above, somewhat 

 compressed at the sides and divided by a narrowed band, slightly depres- 

 sed into an upper and lower portion ; mesothorax short, not depressed, 

 its upper surface sub-piceous; metathorax narrowed posteriorly, de- 

 scending gradually to the pedicle; scale large, slightly inclined for- 

 wards aud wedge-shaped ; abdomen sub-truncate in front, round-ovate, 

 subobtuse ; legs long and slender ; whole ant smooth and shining ; pos- 

 terior part of the abdomen sprinkled with a few hairs. 



Worker. Length 0.22 inch. — Head wider than the prothorax, 

 and but slightly emarginate; mesothorax depressed and strangulated; 

 metathorax raised, narrowed upwards, and rounded above ; otherwise 

 like the female. 



Bab. — Maine, (Norton). 



2. Formica Nortonii, n. sp. 



Worker. Length 0.23 inch. — Upper surface of thorax and abdo- 

 men and the back part of the head, dark reddish-brown, the rest yel- 

 lowish-red or pale yellow; head subtriangular, round above, not emar- 

 ginate, posterior angles rounded ; eyes large, subelliptical, lateral, placed 

 on the upper surface, a little behind the middle; mandibles rounded 

 at base, then subtriangular and many toothed, apical tooth long, curved 

 in and acute ; antenna) inserted near the base of the clypeus, subclavate, 

 long, filiform ; clypeus slightly carinated ; under surface of the head 

 not channelled, prothorax little narrower than the head, round in 

 front, at top and sides, and widest posteriorly; mesothorax slightly de- 

 pressed in front, somewhat strangulated at its junction with the meta- 

 thorax, and narrower than the pro- or metathorax ; metathorax slight- 

 ly compressed and inclined gradually to the pedicle, which is inserted 



PBOI EEDINGS EST. SOC. PHILAD. JULY, 1866. 



