154 S. B. Buckley on North American Formicidse. 



in the anterior base of the abdomen; scale large, wedge-shaped, verti- 

 cal ; abdomen broad ovate ; legs long, slender ; upper surface of head 

 and abdomen thinly sprinkled with short, white hairs. 



Female. Length 0.30 inch. — Head ovate, small, three-fourths as 

 wide as the prothorax ; prothorax compressed at the sides, rounded in 

 front and somewhat flattened above; mesothorax convex on the upper 

 surface, which is as high as the prothorax and nearly as wide ; meta- 

 thorax compressed, narrowed black, sloping gradually to the pedicle; 

 wings with one marginal, two submarginal and no discoidal cells, ex- 

 tending 0.10 inch beyond the abdomen; otherwise like the worker. 



Ilab. — Connecticut, (Norton). 



3. Formica americana, n. sp. 



Female. Length 0.29 inch. — Wings extending 0.08 beyond the 

 abdomen, with one marginal and two submarginal cells; black; mouth, 

 trochanters and tibiaj, dark reddish-brown; tarsi reddish-yellow; head 

 narrower than the prothorax, ovate, rounded above, at the sides and 

 occiput; eyes large, prominent, elliptical, placed about midway on the 

 sides; antennae long, filiform and not enlarged towards their apical 

 joints, inserted at the base of the clypeus; ocelli 3, placed at top of 

 occiput; mandibles widened anteriorly and toothed; under surface of 

 the head not channelled; prothorax elevated, round above in front, 

 and somewhat compressed at the sides ; mesothorax a little higher than 

 the prothorax, rounded above, and narrowed behind ; metathorax de- 

 pressed and but a little narrower than the prothorax, subtruncate; 

 scale large, wedge-shaped and vertical ; abdomen subtruncate in front, 

 ovate and subacute, the last segment thickly sprinkled with hairs; legs 

 slender. 



Worker. Length 0.20. — Head and abdomen black; thorax and 

 legs dark reddish-brown, with lighter shades of yellowish-red; smooth 

 and glossy throughout; prothorax about one-third narrower than the 

 head; scale small, thin, wedge-shaped; the whole thorax compressed 

 at the sides and narrowed behind, its divisions not strongly marked ; 

 abdomen ovate, the margins of the segments hyaline; otherwise like 

 the female. 



Ilab. — Connecticut, (^Norton). 



4. Formica Connecticutensis, n. s\i. 



Worker. Length 0.22 inch. — Black; head ovate, rounded above, 

 at sides and posteriorly ; eyes large, circular, sublateral and near the 

 posterior angles; antenna? inserted near the base of the clypeus, long, 

 filiform, and very little enlarged towards their apical joints; mandibles 



