Dec, 1910.] Wheeler : North American Camponotus. 223 



1893, p. 675 5?; Wheeler, Bull. Amer. Mus. Nat. Hist. XXI, 1905, p. 403; 

 Occas. Papers Bost. Soc. Nat. Hist. VII. 7, 1906, p. 24. 



Worker major. — Length 5.5-7.5 mm. 



Very similar to the specific type from Western Europe but averaging 

 smaller. Body shining ; finely shagreened, more coarsely on the head and 

 thorax, which therefore appear a little more opaque than the gaster. Clypeus 

 subopaque, sometimes subcarinate in the middle. Front and sides of head 

 with small and rather shallow, scattered foveolse. Thorax evenly arched 

 above, moderately broad in front, laterally compressed behind ; pronotum 

 flattened above, with a faint median impression ; epinotum with feebly convex 

 base and concave declivity, passing over into each other through a rounded 

 angle. Petiole slightly narrower than the posterior end of the epinotum, 

 compressed anteroposteriorly, with feebly convex anterior and posterior sur- 

 faces and rather sharp, entire upper and lateral border. 



Pubescence scattered, indistinct except on the gaster. Hairs long, very 

 sparse. Cheeks and clypeus without erect hairs. Scapes and legs naked. 



Black ; cheeks, mandibles, legs, antennse, petiole, articulations of the 

 thorax and petiole and sometimes also the pronotum deep reddish-brown. In 

 some specimens the clypeus is also more or less reddish, the scapes, middle 

 portions of the femora and tibise more or less blackish. 



Worker minor. — Length 4-5.5 mm. 



Differing from the worker major in the shape and smaller size of the 

 head, the more pronounced clypeal carina, proportionally longer antennae, 

 less arcuate thorax and the absence or very feeble development of the 

 foveolas on the anterior portion of the head. 



Female. — Length 8-9 mm. 



Like the soldier except in the structure of the thorax. Wings tinged 

 with yellowish or brown ; veins and stigma yellowish. 



Male. — Length 5.5-7 mm. 



Clypeus carinate, with straight, entire anterior border ; cheeks straight, 

 subparallel, about as long as the eyes ; head behind the eyes broad and 

 rounded. Body shining; anterior portion of the head without foveolae. Erect 

 hairs sparse, absent except on the clypeus and gaster. Color black, appendages 

 sometimes more or less reddish, with pale articulations. Wings like those 

 of the female. 



Emery mentions this form as occurring in New York, District of 

 Columbia, Pennsylvania, Florida and California. I have examined 

 a large number of specimens from the following localities : 



New York: W^est Farms (J- Angus); Niagara Falls; Brooklyn, 

 in maple tree; Staten Island (W. T. Davis); Ithaca and Albany 

 (N. Y. State Coll.). 



New Jersey: Lakehurst, in branches and dead cones of Pinus 

 rigida (Wheeler) ; Clementon (J. C. Bradley) ; Cumbridge County 

 and Boonton (H. Viereck). 



