862 CALIFORNIA ACADEMY OF SCIENCES. 



4. Camponotus esuriens (Smith) Mayr. 



Formica esuriens Smith, Cat. Hym. Ins. Brit. Mus., vi, 1858, p. 54. 

 Camponotus vulpinus Mayr, Verb. zool. bot. Ges., Wien, xii, 1862 



pp. 658 and 770. 

 Camponotus esuriens Mayr, Verb. zool. bot. Ges., Wien, xiii, 1863 



p. 398. 

 Formica esuriens Norton, Am. Nat., ii, 1868, j). 59. 

 Formica (Camponotus) esuriens Norton, Proc. Essex Inst., vi, 1868 



Comm., p. 1. 

 Camponotus atriceps st. esuriens Forel, Bnll. soc. Vaud. sc. nat. (2 



xvi, P. 81, 1879, p. 76. 

 Camponotus esuriens McCook, Proc. Acad. Nat. Sc, Philad., 1879 



p. 140. 

 Camponotus atriceps st. esuriens Forel, Bull. soc. Vaud. sc. nat. 



XX, P. 91, 1884, p. 340. 



Numerous workers. Tepic, Mexico. 



5.' Camponotus frontalis n. sp. 



Large worker: Length, 7.8 mm. Head quadrangular, 

 its sides parallel and gently curved anteriorly, the occiput 

 slightly emarginate. Clypeus about twice as long as 

 broad, its sides slightly diverging anteriorly, the anterior 

 margin nearly straight. Frontal area small, obsolete. 

 Eyes rather small, oval and but slightly projecting. Man- 

 dibles robust, furnished apparently with six teeth. Scale 

 wedge-shaped, stoutest at base, broadest above, slightly 

 convex in front, nearly straight behind, the apex rounded. 

 Head and thorax opaque and densely and finely granu- 

 lated; sparsely punctured; punctures of the prothorax 

 somewhat coarser and more numerous and the surface 

 slightly reticulate. Clypeus rugoso- granulate. Mandi- 

 bles sub-opaque, finely and densely striated and sparsely 

 punctured. Abdomen slightly polished, densely and 

 finely granulated, the punctures rather numerous and 

 coarse. 



Erect hairs white and glistening, that of the head short 

 and not readily observed and .intermixed with few minute, 

 appressed yellowish hairs. Pubescence of the thorax and 



