NO. 1708. f^TUDIES OF NORTH AMERICAN WEEVILS— PIERCE. 341 



Genus CALYPTILLUS Horn. 



CALYPTILLUS CRYPTOPS Horn. 



McCook, Nebraska (Hubbard and Schwarz). 

 Tribe OPHRYASTINI. 



Group OPHRYASTES. 



KEY TO GENERA OF GROUP OPHRYASTES. 



Rostrum with ecrobes that are very deep and definite, even at their termination, 

 passing rapidly inferior; eyes narrow and acute below. 



1. Third tarsal joint broadly bilobed, and much wider than second, pubescent 



beneath. 

 a^. Rostral striae deep, the lateral ones strongly angulate at base of beak, meeting 

 scrobes beneath eyes; second ventral segment nearly as long as third and 



fourth combined Sapotes Casey. 



o^. Rostral striae not so sharply outlined, straight; second ventral segment much 

 shorter than third and fourth combined. 



6'. Mentum concealing palpi entirely Eupagoderes Horn. 



6^. Palpi projecting beyond apex of mentum Caccophryastes Sharp. 



2. Third tarsal joint not broadly bilobed, hardly wider than second, emarginate at 



apex, not pubescent beneath; rostral striae straight. 



a^. Prothorax more or less tuberculate at sides and very little narrower than 

 elytra, if at all; corbels of posterior tibiae more or less imperfectly cavern- 

 ous Ophryastes Schonherr. 



a^. Prothorax not tuberculate at sides, very much narrower than elytra; corbels 

 of posterior tibiae with laminate tip Tosastes Sharp. 



Genus SAPOTES Casey. 



Specimens of this genus are at hand, and invariably show a well 

 defined fimbriation of the ocular lobes, although the fimbriae are 

 short. 



SAPOTES PUNCTICOLLIS Casey. 



Winslow, Arizona (Hubbard and Schwarz). 



This species is very variable in color, so that the color charac- 

 terization given by Colonel Casey should not be considered. 



Specimens are at hand from Albuquerque, New Mexico, January 28 

 (H. Soltau), uniformly larger, but can not be distinguished by any 

 valid character. 



Genus EUPAGODERES Horn. 



EUPAGODERES SPECIOSUS LeConte. 



Yuma, Arizona, April 17 (Robert Brown), Phoenix, Arizona 

 (J. S. Tait). 



EUPAGODERES DECIPIENS LeConte. 



Del Rio, Texas, July 13; El Paso, Texas (Wickham); Brewster 

 County, Texas (Chisos Mountains), June 10 (Mitchell and Cushman); 

 Tucson, Arizona, December 1 7 ; Catalina Springs, Arizona, May 1 (Hub- 



