126 NORTHERN ZOOLOGY. 



(175) 2. * Onthophagus scabricollis. Rough-necked Onthophagus. 



O. ( scabricollis J aler, obscurus, capitis clypeo femineo utrinque integro, vertice bicarinato ; prothorace scaberrimo, antice sub- 

 prominente, cubito obtuse quadridentato. 



Rough-necked Onthophagus, black, not glossy; shield of the head of the female not notched on each side, vertex two- 

 ridged ; prothorax very rough, anteriorly rather prominent; cubit obtusely quadridentate. 



Length of the body 4 lines. 



A single female specimen taken in Canada by Dr. Bigsby. 



DESCRIPTION. 



This is so like the last insect that I felt at first disposed to consider it as merely a variety. The 

 following differences in their characters induce me however to consider them as distinct. Not to 

 mention the difference of size, the female of O. latebrous has a distinct notch on each side of the 

 head, of which there is no trace in O. scabricollis, the ridges of the vertex of the latter are more 

 elevated, the prothorax is larger in proportion and much rougher, with larger and more numerous 

 granules, and the four teeth of the cubit, which in the former are long and acute, in the latter are 

 shorter and obtuse. 



/3. Arenicol^e. Kirb. 



Family TROGID^. Trogidans. 



LXVII. Genus TROX. Fab. 



(176) 1. * Trox arenarius. (Fabricius.) Sand Trox. 



T. arenarius. Fab. Ent. Syst. i, 87, 3 ; Syst. Eleuth. i, 111, 5. Oliv. Ent. i, 4, 10, 9, t. i, /. 7. Herbst. Ins. iii, 17, 2, 

 t. xxi, f. 2. Gyll. Ins. Suec. i, 11, 3. Panz. En. Germ, xcvii, t. 1. Sturm. Deutsclt. Ins. ii, 149, 5. Sehneid. Mag. 

 279, 2. Lat. Gen. Crust, et Ins. ii, 99, 3. 



Scaraboeus arenarius. Marsh. Ent. Brit, i, 25, 41. 



, arenosus. Linn. Syst. Nat. Gmel. iv, 1586, 398. 



Silpha scabra. Linn. Syst. Nat. ii, 573, 23. 



Trox scaber. Illig. Kaf. Preuss. i, 99, 2. Steph. Illustr. Mandib. iii, 215, 3. 



barbosus. Lai. Ins. Tyr. i, 31, 3. Scrib. Ins. i, 45, 10, t. v, f. 3. Journ. i, 58, 45. 



hispidus. Payk. Fn. Suec. i, 81, 3. 



Length of the body 3 lines. 



Taken by Capt. Hall in Nova Scotia. 



