416 SEEEICOENIA. 



CAKDIOPHORUS. 



Cardiophorus, Eschscholtz, in Them's Archiv, ii. 1, p. 34 (1829) ; Candeze, Monogr. Elat. iii. 



p. 106. 

 Caloderus, Stephens, Illustr. Brit. Ent., Mandib. iii. p. 269 (1830). 

 Dicronychus, Brulle, Exped. Scient. de Moree, Anim. Artie, p. 138 (1832) (nee Castelnau, nee 



Germar). 

 Gauroderus, Thomson, Skand. Col. i. p. 104 (1859). 



This widely distributed genus contains a large number of species, but it is almost 

 absent from Tropical America, where it is replaced by Aptopus, Triplonychus, Eoristo- 

 notus, and Esthesopus. In the New World Cardiophorus apparently does not extend 

 south of the Mexican States of Vera Cruz and Guerrero *. The four species here 

 enumerated from Mexico may be separated thus : 



a. Claws strongly toothed at the base ; elytral interstices convex ; prothorax with 



distinct basal sulci aptopoides. 



b. Claws simple. 



a'. Elytra coarsely and deeply punctate-striate ; prothorax with distinct basal 



sulci. 



•* 



a". Elytral interstices very convex ; length 6|-7^ millim . brevis. 



b". Elytral interstices moderately convex ; length 5-6 millim vulneraius. 



b'. Elytra finely and shallowly punctate-striate, the interstices almost flat ; pro- 

 thorax without distinct basal sulci . mexicanus. 



l. Cardiophorus aptopoides. (Tab. XIX. fig. 2,6.) 



Cardiophorus aptopoides, Cand. Elat. Nouv. i. p. 64 (1864), v. p. 47 nota (1893) (part.) \ 



a. The prothorax rufous, with a black patch of variable size on the disc ; the elytra each with an orange- 

 yellow submarginal vitta. (Fig. 2.) 



Eab. Mexico, Yentanas in Durango (Edge), Cuernavaca in Morelos (Salle, H. E. 

 Smith), Yautepec in Morelos (Edge), Chilpancingo in Guerrero (Edge, E. E. Smith), 

 Tepetlapa and Amula in Guerrero (E. E. Smith), Sinaloa 1 . 



(3. The prothorax rufous, with a large black patch on the disc, the black sometimes extending to the greater 

 part of the surface ; the elytra entirely black. 



Eab. Mexico, Chilpancingo (Edge, E. E. Smith), Tepetlapa and Cuernavaca (//. E. 

 Smith). 



y. The prothorax and elytra entirely black. 



Eab. Mexico, Chilpancingo (Edge, E. E. Smith). 



It is possible, as stated by Dr. Candeze \ that the form of the tarsal claws is variable 

 in C. aptopoides ; but it seems to me to be very doubtful if such is the case, and the 



* C. humeralis, Fairm,, from Chili, belongs probably to another genus. 



