122 AMERICAN COLEOPTERA. 



cut off by the oblique line seems always to be devoid of 

 punctures. 



A second character used by Sharp in grouping the Mexican 

 species is the presence of a marginal fringe of short ciliae at 

 the sides of the prothorax and elytra. Four species of the 

 Mexican fauna possess this character according to Sharp, 

 viz. — pallipennis, fl oralis, canescens and longiventris. All of 

 these but canescens occur within our faunal limits, and to these 

 we may add hemipterus, melanopterus and two new species 

 described in the present paper — longtis and rickseckeri. In 

 longtis and longiventris the ciliation is quite conspicuous, in 

 hemipterus and pallipennis distinctly less so, and in the others 

 the fringe is so short that in old or ill-conditioned specimens 

 it might not be at all apparent. It will be observed that all 

 the above species are at least moderately large and convex, 

 none of our smaller depressed forms showing any appreci- 

 able trace of the marginal hairs. 



C. dimidiatus Fab. 



As already indicated in the preceding remarks the ante- 

 rior angles of the metasternum are distinctly less widely 

 truncate by the raised line in this species than in mutabilis 

 and luridus. This character seems to be a very constant 

 one, and taken together with the recognized differences in 

 size, color and sculpture demonstates to my satisfaction its 

 specific distinctness. The metasternal line seems to be iden- 

 tical in position in mutilatus and luridus, and it is probable 

 that we have been correct in regarding them as forms of a 

 single species. 



C. floridanus n. sp. 



Closely similar to dimidiatus in size, form and most details 

 of structure. Head, prothrox and elytra concolorous, brown ; 

 dorsal surface of abdomen and sometimes the metasternum 

 darker. Punctuation a little finer throughout than in dimi- 

 diatus. Legs slightly stouter, the hind tibiae of the male 

 subcylindrical for a short distance at base, then rather ab- 

 ruptly widening, the inner outline arcuate. 



Enterprise, Florida. Two cf's, one 9. 



