CALLIRKHIPIS. 575 



a. Legs more or less elongate ; body black, fuscous, or brown ; upper surface 

 pubescent in the $ , almost or quite glabrous in the $ *. 

 a!. Basal joint of the hind tarsi not longer than the following two joints united. 

 a". The elytral costae not connected by numerous transverse raised lines; 

 antennae strongly nabellate in the $ . 

 a'". Second elytral costa curved posteriorly and distinctly reaching the 

 suture behind ; eyes large and prominent in the g . 

 a 4 . The second costa strongly and very acutely raised from the middle 

 onwards, the others indistinct : body robust in both sexes ; front 



grooved and excavate carinifer. 



U. The second costa moderately raised. 



a 5 . Body broad and robust in both sexes; ante nnal rami {<$) exces- 

 sively elongate valida. 



b s . Body narrow in the $ , robust in the ? ; antennal rami ( <$ ) 

 shorter. 

 a 6 . Prothorax not or moderately dilated behind. 



a 7 . Elytral punctuation almost uniform in the $ ; frontal excava- 

 tion rather shallow obsoleta. 



b 1 . Elytral punctuation becoming very coarse towards the base 

 in the £ ; frontal excavation deep ; antennae stoutly and 

 moderately pectinate, and with the eleventh joint short, in 



the $ unicostata. 



b G . Prothorax strongly dilated behind ; frontal excavation and pro- 

 thoracic f oveae deep ; antennae strongly pectinate, and with the 



eleventh joint elongate, in the ? dilaticollis. 



b'". Second elytral costa not distinctly extending in a curved line to the 

 suture behind, but sometimes connected with it, and with the third 

 also, by a faint oblique raised line. 

 c 4 . Body broad and robust ; elytra with very faint costae, the punctuation 

 rather fine, with the interspaces thickly, minutely punctulate ; frontal 

 excavation and prothoracic foveae deep ; antennal rami ( $ ) exces- 

 sively elongate ; eyes ( J ) large and prominent : size very large . . childreni. 

 d*. Body narrow in the <$ , robust in the $ ; antennal rami moderately 

 elongate : size smaller. 

 c 5 . Upper surface thickly pubescent in the $ ; eyes rather small in 



both sexes : body black in the ? vestita. 



d s . Upper surface sparsely pubescent in the $ ; eyes large : body 



blackish-brown in the $ mexicana. 



b". The elytral costae connected by numerous transverse raised lines ; eyes 



small and the antennal rami short in the $ venosa. 



* The females of C. obsoleta, C. childreni, C. venosa, and C. tenuvpes are unknown. 



