290 Journal Xew York Entomological Society, t^'o'- x>^ii- 



S. simulans SchaetTer. Texas. 



Shaeffer, /. c, XIII, 1905, p. 180. 

 S. huachucse Schaeffer. Arizona. 



Schaeffer, Sci. Bull. Brookl. Inst. Mus., I, 1905, p. 176. 

 S. defecta Schaeffer. Arizona. 



Schaeffer, /. c, p. 175. 

 S. pulchella Miiklin. Mexico, Texas. 



Maklin, /. c, p. 589 ; Champion, /. c, p. 32, pi. 2, fig. 8 ; Schaeffer, 



Jovjrn. N. Y. Ent. Soc, XIII, 1905, p. 180. 



There are many Mexican species of Statira, which are not included 

 in this list. 



A SHORT REVIEW OF THE NORTH AMERICAN 



SPECIES OF ONTHOPHAGUS 



(COL. SCARAB.). 



By Charles Schaeffer, 

 Brooklyn, X. Y. 



The addition of three more species of Onthopliagus to our fauna 

 besides those species made known since Dr. Horn published his paper^ 

 on the North American species of this genus make it advisable to 

 give an account of all our species. Dr. Horn enumerated five species 

 in the paper mentioned above with three varieties of janus. Two of 

 these varieties, snbcvncus and orphcus, are restored to specific standing 

 as they are in no way connected with each other. The armature of 

 the head and prothorax of the males of certain Scarab.xid.T differ very 

 much individually and are greatly reduced in the smaller and feebler 

 males which resemble then more or less the females, but, as a rule, 

 either the reduction or the stronger development of the armature 

 affects the head and prothorax alike in the same species and never is 

 one part more developed or reduced than the other. 



The males of those species of which the two sexes do not differ 

 from each other in the form of prothorax are said to be known only 

 by their more slender anterior tibine and smoother head. This is true, 

 but the difference, especially in the anterior tibia?, is not so striking 

 in our species. However, a better character of distinguishing the two 

 sexes, which I do not find mentioned anywhere, is the form of the 



1 Trans. Am. Ent. Soc, Vol. V, p. 137. 



