116 LAMELLICOKNIA. 



Fam. TROGIME. 



TROX. 



Trox, Fabricius, Syst. Eat. p. 31 (1775) ; Harold, Monogr. in Col. Hefte, ix. p. 1 (1872). 



M. Preudhomme de Borre enumerates 119 species of this almost universally distri- 

 buted genus in his monograph 'Catalogue des Trogides,' recently published. The 

 genus is only moderately well represented in Central America. 



1. Trox scutellaris. 



Trox scutellaris, Say, Journ. Acad. Phil. hi. p. 238 (1823) l ; Complete Writings, ii. p. 140; Harold, 



Col. Hefte, ix. p. 56 2 . 

 Omoryus scutellaris, Lee. Proc. Ac. Phil. vii. p. 214 3 ; Col. of Kansas and Eastern New Mexico, 



t. 1. f. 4. 



Hab. Noete America, Missouri 1 to Texas 2 , Kansas 2 3 , New Mexico 2 3 . — Mexico 

 (Salle), Monclova in Coahuila (Dr. Palmer), Durango city, Chihuahua city, Villa Lerdo 

 (Edge), Cuernavaca 2 . 



2. Trox monachus. 



Trox monachus, Herbst, Natursyst. bekammt. ausl. Ins., Kaf. hi. p. 25, t. 21. f. 7; Harold, Col. 

 Hefte, ix. p. 13 6 \ 



Hab. North America 1 , Southern States. — Mexico (Salle). 



3. Trox punctatus. 



Trox punctatus, G-ermar, Ins. Sp. Nov. p. 113 (1824) ; Harold, Col. Hefte, ix. p. 124 \ 

 Var. Omorgus tesselatus, Lee. Proc. Ac. Phil. vii. p. 216 (1854) 2 . 

 Trox tessellatus, Harold, loc. cit. p. 124 3 . 



Hab. North America, Southern States \ Mexican boundary 2 . — Mexico, Sonora l , 

 Nuevo Laredo, Chihuahua city, Villa Lerdo, Guanajuato city, Monterey (Edge). 



All the numerous Mexican examples belong to the form T. tessellatus, (Lee), which 

 Von Harold considers 3 to be a variety of T. punctatus, though the rows of polished 

 tubercles on all the elytral interstices give it a distinct character. The sculpture of 

 the thorax and elytra is almost exactly as in T. scutellaris, from which its oblong form 

 and large humeral callus distinguish it. 



4. Trox asper. 



Omorgus asper, Lee. Proc. Ac. Phil. vii. p. 215 (1854) \ 

 Trox asper, Harold, Col. Hefte, ix. p. 118 2 . 



Hab. North America, Southern States 1 2 .— Mexico 2 , Northern Sonora (Morrison), 

 Presidio (Forrer). 



