June, I9II.] Wheeler: New Camponotus from California. 97 



rather sharply shagreened. Whole surface of head sparsely punctate, the 

 punctures being more numerous on the mandibles, cheeks, clypeus and front 

 than on the sides, posterior corners and occiput. Thorax shining, the pro- 

 and mesonotum finely, the pleurae, epinotum and petiole more coarsely sha- 

 greened, so that these parts are more opaque. Pro- and mesonotum corsely 

 and sparsely punctate. Gaster glossy, its surface coarsely and transversely 

 shagreened and covered with small piligerous punctures. Legs shining, deli- 

 cately shagreened. 



Hairs and pubescence pale yellowish ; the former long, sparse and erect 

 on the upper surface of the head and thorax, on the gula, border of petiole 

 and dorsal and ventral surfaces of the gaster. Tips of femora and antenna! 

 scapes with a few short hairs. Pubescence sparse, short and inconspicuous 

 on the head, thoracic dorsum, legs and scapes, longer on the upper surface 

 of the gaster. Sides of head without hairs or pubescence. Hind tibiae without 

 bristles along their flexor surfaces. 



Deep black ; antennal funiculi and sometimes also the legs, mandibles, 

 clypeus, anterior border of the head and thoracic sutures more or less tinged 

 with dark brown or red : posterior borders of gastric segments brownish yel- 

 low, with a golden reflection. 



Worker Minor. — Length 3.5-6 mm. 



Differing from the worker major in the small size and shape of the head, 

 which is somewhat longer than broad, with less convex sides and more nearly 

 straight posterior border. Mandibles 5-toothed. Clypeus subcarinate, the 

 notch in the middle of its anterior border small and indistinct. Antennal 

 scapes reaching nearly one-third their length beyond the posterior corners of 

 the head. Eyes rather large, very feebly convex. 



Sculpture, pilosity and color as in the worker major, except that the sides 

 and posterior portions of the head are less shining, the mandibles are red and 

 the sparse pubescence is more conspicuous on the upper surface of the head 

 and thorax. 



Female. — Length 9— 11 mm. 



Resembling the worker major. Head longer than broad, a little broader 

 behind than in front, with straight sides and posterior border. Antennal 

 scapes reaching a little beyond the posterior corners. Thorax through the 

 wing insertions as broad as the head. Epinotum with short, convex base and 

 longer, abrupt declivity. Petiole in profile narrowed from the base upward to 

 a sharp border, which is rounded, entire and slightly produced in the middle 

 line when seen from behind. Wings long (10 mm.). 



Sculpture, pilosity and color much as in the worker major, except that 

 the pronotum and scutellum are more glabrous and shining and the upper 

 surface of the gaster is smoother and less glossy. Wings tinged with brown- 

 ish ; veins and stigma pale brown. 



Male. — Length 7-8 mm. 



Head, including the eyes, as long as broad, rounded behind, with straight 



