I 



Dec, 1914] Schaeffer: North American Onthophagus. 293' 



14. Prothorax and elytra uniformly brownish black, dull anthracinus. 



Prothorax aeneous or bronze, shining 15 



15. Prothorax uniformly aeneous or bronze, shining; elytra piceous, with more 



or less distinct yellow spots, surface with a somewhat greasy appear- 

 ance ; prothorax of male produced anteriorly into a short, conical 

 lobe ; anterior tibiae elongate with a pencil of hairs in the apical 



emargination landolti. 



Prothorax shining, bronze or aeneous at middle, at sides more or less yel- 

 lowish ; elytra brown, dull, with yellow spots more or less longitudi- 

 nally confluent, forming in some specimens longitudinal vittae ; pro- 

 thorax alike in the male and the female, unmodified; anterior tibiae 

 of male scarcely more elongate than in the female and without pencil 

 of hairs in the apical emargination texanus. 



Onthophagus coproides Horn. 



Horn, Trans. Kans. Acad. Sci., Vol. VII, p. 79. 

 ?0. cuboidalis Bates. Biol. Cent. Am. Col., Vol. 11, pt. 2, p. 79. 



Our largest species (10— 11 mm.) ; of uniform black color, polished. 

 The clypeus of the male is broad, the sides nearly straight; anterior 

 margin with more or less rounded sides, subtruncate at middle, lower 

 carina present, but feeble ; upper carina arcuate, produced laterally 

 on each side into a short horn. Prothorax suddenly declivous in 

 front, at middle broadly, subtriangularly produced ; the punctuation is 

 rather strong in front becoming finer and almost obliterated at base, 

 the base with narrow, elevated margin. The elytral intervals are 

 feebly punctate. The female has a smaller clypeus with oblique sides 

 and emarginate anterior margin; the carinse are stronger than in the 

 male, the posterior one is somewhat depressed at middle. 



The description of the Mexican 0. cuboidalis agrees with our 

 insect very closely and is possibly the same. 



Onthophagus polyi)hemi Hubbard. 



Hubbard, Insect Life, Vol. VI, p. 311. 



This species is of the size of O. orphcus fotind in the holes of 

 the gopher (Gopherus polyphemus) in Florida and is one of the 

 remarkable discoveries of the lamented H. G. Hubbard. The color is 

 uniform black, shining. The clypeus is arcuate and feebly truncate 

 in front ; in the male the lower carina is distinct and the upper carina 

 more or less obsolete at middle or sometimes reduced to a pair of 

 tubercles ; the prothorax is convex, rather suddenly declivous in front 



