Horn.] 



OPHRYASTrNT. 47 



In their form of A^estiture the two genera agree. In both the supports of 

 the mandibular pieces are moderately prominent and obliquely truncate at 

 tip. 



Amomphus {Cottyi) is also closely allied and differs especially in the wide 

 metasternal side pieces with the suture distinct. 



Two species occur in our fauna. 

 Ocular lobes distinct but feeble, surface covered 

 with very dark piceous scales and short cine- 

 reous hair rugicollis. 



Ocular lobes wanting but replaced by a decided 

 fringe of stiff hairs, surface with cinereous 

 scales and longer greyish hair hispida. 



P. rugicollis, n. sp. 



Form oblong, color piceous, surface sparsely covered Avith inconspicuous 

 scales, not differing in color from that of the surface, and with short 

 brownisli hairs. Head and rostrum slightly longer than the thorax, 

 sparsely scaly and with few hairs. Thorax transversely oval, apex and 

 base truncate, sides moderately arcuate, disc moderately convex, granulate - 

 rugulose, median line obsoletely impressed, surface sparsely scaly and 

 pilose. Elytra oblong oval, base feebly emarginate, humeri sub-rectangular, 

 disc moderately convex, feebly striate and with coarse punctures mode- 

 rately closely placed, intervals flat, sparcely scaly, bi-seriately pilose. Body 

 beneath and legs indistinctly scaly and with short greyish hairs. Length 

 .30 inch ; 7.5 mm. 



Occurs in Colorado and New Mexico. 



This species bears considerable resemblance superficially to Melamom- 

 phus niger of the present tribe. 



P. hispida, n. sp. 



Oblong oval, piceous, surface scaly and hispid. Head and rostrum as 

 long as the thorax, moderately densely punctured, not densely scalj^ and 

 with numerous, moderately long, erect, yellowish hairs. Thorax oval, 

 slightly narrower in front, as broad as long, sides moderately, base feebly 

 arcuate, disc moderately convex, surface densely and rather coarsely punc- 

 tured and rugulose, moderately densely scaly and hairy. Elytra oblong 

 oval, nearly three times as long as the thorax, moderately convex, surface 

 deeply striate, striic with large but not closely placed punctures, intervals 

 flat, finely punctured, sparsely scaly and hairy. Body beneath piceous, 

 sparselj^ scaly and with shorter hairs than the upiier surface. Legs piceous, 

 sparsely scaly and hairj^, the tibitB with longer liairs. Length .36 inch ; 

 9 mm. 



The scales covering the surface rather sparsely are of a dirtj'-white color 

 with a slight tinge of cupreous. In form this insect resembles Amomphu$ 

 Cottyi but with the sides of thorax and elytra more arcuate. 



Occurs abundantly in Colorado, 



