32 LAMELLICOEJSTIA. 



17. Canthon praticola. 



Canthon praticola, Leconte, Col. of Kansas and Eastern New Mexico, p. 10 x ; Horn, Tr. Am.. 

 Ent. Soc. 1870, pp. 44, 45 2 . 



Eab. North America, Kansas 1 2 . — Mexico, Santa Clara in Chihuahua, Chihuahua 

 city, Villa Lerdo in Durango (Edge). 



Dr. Horn gives the size of the North-American form as 6|-9| millim. The North- 

 Mexican examples vary from 8-11 millim. In other respects the latter agree closely 

 with Dr. Horn's description and with numerous examples from Colorado (?) in my 

 collection. 



18. Canthon laevis. 



Scarabceus Icevis, Drury, 111. Exot. Ins. i. p. 79, t. 35. f. 7 \ 



Scarabceus volvens, Eabr. Ent. Syst. i. p. 66. 



Canthon lavis, Harold, Berl. ent. Zeitschr. 1868, p. 99; Horn, Tr. Am. Ent. Soc. 1870, pp. 45 & 47 3 . 



Eab. North America 1 2 . — Mexico, Monclova in Coahuila (Dr. Palmer), Nuevo 

 Laredo in Tamaulipas, Villa Lerdo in Durango, Zacualtipan in Hidalgo, Monterey 

 (Edge), Orizaba (Salle). 



Herr Hoge obtained a good series of examples, all black with a scarcely perceptible 

 greenish tinge, and rather smaller (12-16 millim.) than the typical form of the middle 

 Atlantic States. The single specimen from Orizaba is very small (10 millim.). 



19. Canthon hidalgoensis. 



G. tcevi proximo affinis, sed minor et brevior, granulis minutissimis haud elevatis densissime conspersus. Niger, 



vix obscure viridi tinctus. 

 Long. 8-12 millim. tf $ . 



Eab. Mexico, Zacualtipan in Hidalgo, Aguas Calientes city (Edge). 



The granulation is so fine that to the naked eye the insect appears smooth. The 

 granules on the thorax are reduced to minute shining specks without elevation, the 

 interstices between which are finely alutaceous. Bare examples with the granules on 

 the elytra more elevated tend to bridge over the difference between this species and the 

 North-Mexican form of C. Icevis. 



All the numerous examples, with the exception of one from Aguas Calientes, were 

 taken at Zacualtipan. 



20. Canthon circulatus. 



Canthon circulatus, Harold, Berl. ent. Zeitschr. 1868, p. 72 \ 

 Eab, Mexico 1 . 

 Our collections do not appear to contain this species. 



