BUFFALO SOCIETY OF NATURAL SCIENCES 87 



ated at apex; nervures brown, blackish at base. Beneath black with the legs 

 pale. Face black, ocelli pale, sides of the clypeus at base and the callos- 

 ities on the metopidium castaneous. Clypeus broad and rounded, scarcely 

 exceeding the cheeks. Length 5 mm. 



Described trom one pair in the Cornell University collection 

 taken at Ithaca, N. Y. , June 23d 1885, by O. F. Pearce. I am 

 not certain that these are sexes of one species but their shape 

 and pattern of marking is so peculiar and so similar that I have 

 thought it best to place them together in spite of the fact that 

 the form of the head shows a greater variation than we gener- 

 ally find in one species. A difference in maturity however 

 might well account for a part of this. If distinct the name 

 should follow the female. 



10. Cyrtolobus vau Say. PI. 2, fig. 19. 



This species is found commonly throughout the eastern 

 United States and as far west as Colorado. Say's very concise 

 description leaves no question as to its identity. Like the allied 

 species it varies much in depth of coloring and somewhat in the 

 elevation of the dorsal crest. The females are pale testaceous 

 or yellowish brown, sometimes more or less tinged with ferru- 

 ginous on the crest. The anterior oblique vitta is frequently 

 broken, the dorsal portion forming a whitish spot on the an- 

 terior base of the crest, the inferior portion being slender above, 

 and at times connecting with the large squarish median spot. 

 The male is fuscous or blackish, becoming ferruginous ante- 

 riorly; frequently the anterior vitta is nearly obsolete above but 

 forms a conspicuous triangular spot on the margin below the 

 median spot; On the metopidium there is a pale area on the 

 humeral angles and an indistinct whitish vitta either side of the 

 median carina. The head is pale varied with ferruginous brown 

 with the lorse distinct and the clypeus linear, rather broad, and 

 well produced before the cheeks. 



11. Cyrtolobus limus n. sp. 



Allied to vau but darker and more clearly marked; per- 

 haps only a variety of that species. 



Female: pronotum little elevated, dorsum quite regularly arcuated, a 

 very little sinuated at the posterior white vitta; posterior process short and 

 obtuse, attaining the terminal areole. Face uneven, coarsely and sparcely 

 punctured with blackish; margins of the cheeks very slightly sinuated. Cly- 



