374 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 45. 



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

 apex, not pubescent beneath; rostral striae straight, 

 e'. Prothorax more or less tuberculate at sides and very little narrower than 

 elytra, if at all; corbels of posterior tibiae more or less imperfectly cavernous. 



Ophryastes Schonherr. 

 e'. Prothorax not tuberculate at sides, very much narrower than elytra; corbels 



of posterior tibiae with laminate tip Tosastes Sharp. 



2. Abdomen with second segment longer than the two following together, first suture 

 strongly arcuate. Iiitercoxal process very broad. Third tarsal joint emarginate, 

 but not broader than the second, spinulose beneath Rhigopsis LeConte. 



Genus SAPOTES Casey (1888). 

 Sapotes Casey, Ann. New York Acad. Sci., vol. 4, 1888, p. 241. 

 The genus is raonotypic, based on puncticollis Casey. 



Genus EUPAGODERES Horn (1876). 

 Eupagodercs Horn, Proc. Amer. Philos. Soc, vol. 15, 1876, p. 32. 



In the absence of previous type designations, speciosus LeConte is 

 hereby designated as type. 



Tliis genus is systematically even more difficult than Ophryastes. 

 For the present we must consider Mr. Fall's table as the clearest 

 possible delineation of the specific characters. To this must be 

 added E. cretaceus Sharp recorded by Champion from Arizona. The 

 writer is by no means satisfied that the genus has yet been properly 

 treated and considers that a vast amount of material must be added 

 to our collections first. 



Genus AMYDROGMUS, new genus. 



Rostrum with scrobes deep and definite, passing rapidly inferior; 

 rostral strise almost obsolete, indicated by faint depressions; third 

 tarsal joint broadly bilobed, and pubescent beneath; second abdomi- 

 nal segment subequal to the two following; prothorax not tuber- 

 culate at sides. 



Name derived horn, d/xudpoc- (faint) + o^-zzof (f urrow) = faint furrow, 

 referring to the rostral striae. 



Type of genus. — A. variabilis, new species. 



AMYDROGMUS VARIABILIS, new species. 



Small, resembling Sapotes puncticoUis in form, with elytra more or 

 less robust, closely covered with pavement scales, which are gener- 

 ally white, but sometimes heavily mottled with brown, and with two 

 brown fasciae on prothorax. Length, 4-6 mm.; width, 1.75-2.75 

 mm. Beak strongly constricted at base above and beneath, a little 

 longer than head above, densely covered with white polygonally 

 crowded pavement scales, with short erect set89 interspersed, 

 apically emarginate and medially shallowly sulcate, also with feeble 

 longitudinal impressions in front of eyes. Antennae densely clothed 



