190 AMERICAN COLEOPTERA. 



Mr. W. D. Pierce in a recently published list* of the National 

 Museum material uses the following characters in his key to 

 the genera of the group Ophryastes: 



Third tarsal joint broadly bilobed and much wider than the second, 

 pubescent beneath Eupagoderes. 



Third tarsal joint not broadly bilobed, hardly wider than the second, 

 emarginate at apex, not pubescent beneath.... Ophryastes. 



The first of these diagnoses would exclude all females of 

 Eupagoderes, and the second would shut out the males of at 

 least some of our Ophryastes. Further study of Mr. Pierce's 

 paper leads me to suspect that certain records are based on 

 erroneous identifications in this group. Argentatus and deser- 

 tns are really quite distinct species, and Mr. Pierce's state- 

 ment that the two appear to be identical can hardly be ex- 

 plained in any other way. The remarks about wickhami 

 indicate a failure to properly identify Sharp's species, nor is 

 it likely that speciosus occurs at either Phoenix or Yuma, 

 Arizona. 



The four species described below are true Eupagoderes. 



E. nivosns n. sp. 



Elongate oval, very convex, very densely clothed with white scales, 

 with or without faint mottling of darker scales along the striae ; setae of 

 upper surface spare and exceedingly minute, longer and more numer- 

 ous on the legs and ventral surface. Head not appreciably transversely 

 impressed at base of rostrum, the latter convex, trisulcate, all the 

 grooves fine, the lateral ones rather long, nearly straight ; median 

 groove terminating in a small fovea in the position of the usual trans- 

 verse impression. Prothorax a little less than one-half wider than 

 long, widest at middle, sides rather strongly evenly arcuate, not dis- 

 tinctly constricted, but with a shallow apical marginal groove and a 

 basal marginal impressed line which is deeper at sides ; surface finely 

 rather sparsely irregularly punctate, a little more coarsely so laterally ; 

 median impressed line fine. Elytra oval, without humeri, widest near 

 the middle, twice as long, and one-fourth wider than the prothorax 

 (o"), a little more inflated in the 9; striae fine, somewhat impressed 

 and finely punctate, intervals feebly convex and nearly equal, the first 

 and fourth slightly narrower than the second and third. Beneath and 

 legs white, all the tibiae denticulate within, the front ones most con- 

 spicuously so. Length 12-15 mm. 



Phoenix, Arizona ; a single pair. 



*Proc. Nat. Mus., Vol. 37, p. 341. 



