96 R. W. Dawson 



Specimens examined: 11, from McCook, Grant, Mitchell 

 and Harrisburg. 



Trox tuberculatus De Geer. 



1778. Trox tuberculatus De Geer, Memoirs pour servir a 1' histoire 

 des Insectes, iv, p. 318, pi. 19, fig. 2. 



Specimens examined : 25, all taken at Lincoln from April 

 to July 9, at lights. 



Trox sonorae Le Conte. 



1854. Trox Sonorae Le Conte, Proc. Acad. Nat. Sci. Phila., p. 211. 



Specimens examined: 17, from Lincoln, Harrisburg and 

 the Pine Ridge region of Sioux and Dawes counties, collected 

 from June to August. 



Trox unistriatus Beauvois. 



1805. Trox unistriatus Beauvois, Insectes recueillis en Afrique et 

 en Amerique, p. 175, pi. 4 b. fig. 5. 



Specimens examined: 25, from Lincoln and "Pine 

 Ridge," collected from April to July. 



Trox insularis Chevrolat. 



1864. Trox insularis Chevrolat, Ann. Soc. Ent. France (4) iv, pp. 

 416-417. 



1874. Trox foveicollis Horn, Trans. Amer. Ent. Soc, v, pp. 7, 10. 



Specimens examined: 5, from Lincoln and West Point, 

 taken during April and May. 



Trox aequalis Say. 



1832. Trox aequalis Say, New Species of Insects from Louisiana, 

 p. 5. Le Conte ed., i, p. 301. 



Specimens examined : 9, from Lincoln, collected from 

 April to June. 



Trox scaber Linnaeus. 



1767. Trox scaber Linnaeus, Systema Naturae, ed. xii, p. 573. 



202 



