Dec, 1914] Schaeffer: North American Onthophagus. 297 



Onthophagus pennsylvanicus Harold. 



Harold, Coleopterologische Hefte, Vol. VHI, p. 115. 

 Horn, Trans. Am. Ent. Soc, Vol. V, p. 141. 

 Blatchley, Col. of Ind., p. 920. 



Our most common and well known eastern species which is found 

 as far south as Florida and from there extends to Texas and Kansas. 

 The color is generally brov/nish black, with a faint metallic tint on the 

 prothorax. The prothorax is alike in both sexes, not modified in the 

 male. The clypeus is arcuate-truncate in front. The male has the 

 head without carinse, in some specimens, however, the upper carina is 

 faintly indicated. In the female the upper carina is generally very 

 faintly indicated and the lower distinct; in very small females both 

 carinse are often obsolete or even absent. The front tibiae are slightly 

 more elongate in the male than in the female. 



Onthophagus cribricollis Horn. 



Horn, Trans. Kans. Acad., Vol. VH, p. ~(- 

 Blatchley, Col. of Ind., p. 920. 



This species is described from Kansas and Texas and is reported 

 from Indiana but seems to be very rare in collections. I was unable 

 to secure any specimens from the typical localities but two female 

 specimens in my possession, one from Lakehurst, N. J. and one from 

 Long Island (Yaphank), N. Y., agree in every respect with the 

 description of this species. They look at first sight like very small 

 O. orpheus but the elytra are a little less shining, the prothorax is 

 relatively more coarsely punctate and is distinctly margined at base 

 and the clypeus is rather deeply, triangularly emarginate; the color is 

 dark bronze. The head of the male is described as unarmed and the 

 prothorax not modified. 



This species is perhaps not as rare as it seems and may be over- 

 looked on account of its great resemblance to very small 0. orpheus. 



Onthophagus nuchicornis Linn. 

 Linn., Syst. Nat., I, 2, p. 547. 

 Melsh., Proc. Acad. Nat. Sci. Phil, Vol. H, p. 134 (O. rhinoceros). 



An introduced European species, which is frequently taken in New 

 Jersey and New York (Long Island). 



It is one of the larger species and is black or brownish black, dull, 

 elytra pale, sprinkled with a variable number of darker spots. The 



