72 R. W. Dawson 



Onthophagus Latreille 



1807. Latreille: Genera Crustaceorum et Insectorum, p, 141. 



1875. Horn: "Synonymical Notes and Descriptions of New Species 

 of North American Coleoptera," Trans. Amer. Ent. Soc, v, 

 pp. 126-156. (Descriptive notes and table for five species.) 



1910. Blatchley: Coleoptera of Indiana, pp. 917-920. (Descrip- 

 tive notes and table for five species.) 



1914. Schaeffer: "A Short Review of the North American Species 

 of Onthophagus," Journ. N. Y. Ent. Soc, xxii, pp. 290-300. 

 (Descriptive notes and table for eighteen species.) 



SYNOPSIS OF THE SPECIES 



1. Surface of body polished and shining, length 10 - 13 mm coproides 



Surface of body more or less opaque or dull, length, scarcely, 



or not, exceeding 8 mm 2 



2. Pronotum of male not differing from that of female, simple and 

 convex in both sexes pennsylvanicus 



Pronotum of male protruberant in front, sometimes strongly so 3 



3. Anterior margin of clypeus distinctly emarginate; pronotum 



of male with an obtuse, triangular lobe in front anthracinus 



Anterior margin of clypeus not distinctly emarginate, often 

 rounded or produced medially into a reflexed process; pronotum 

 of male frequently produced anteriorly into a long process more 

 or less emarginate at the apex 4 



4. Body black, opaque; thorax finely granulate; elytral intervals 

 each with two rows of fine granules hecate 



Body shining, bluish, greenish or bronzed; thorax punctured; 

 elytra not granulate ,...orpheus 



Onthophagus coproides Horn. 



1881. Onthophagus coproides Horn, Trans. Kans. Acad. Sci., vii, pp. 

 75-76. 



Specmiens examined : 1 s , collected at Halsey, August 

 23, 1921 by R. W. Dawson. 



Onthophagus hecate Panzer. 



1794. Scarabaeus hecate Panzer, Faun. Ins. Amer. Bor., p. 5, pi. 1, 

 fig. 2. 



178 



