320 MEMOIRS ON THE COLEOPTERA 



Crioprosopus Serv. 



The following species is allied to iridescens White, but seems not 

 to have been included in the material sent by Mr. Harford to Mr. 

 Bates. 



*Crioprosopus praestans n. sp. Stout, convex, dark rufo-piceous and 

 dullish anteriorly, the elytra highly polished, not translucent, bright 

 metallic green, the entire under surface and legs dark red-brown, the 

 femora indefinitely blackish distally; head deeply sulcate to the hinder 

 line of the eyes, finely, sparsely punctate, the antennae black, a fourth 

 longer than the body; prothorax transverse, convex, very coarsely, 

 densely punctate, obtusely prominent and subtuberculate at the sides 

 behind the middle, the median line depressed, flat, finely, sparsely punc- 

 tate, gradually wider basally and with a short axial carina medially, the 

 sublateral subbasal impressions simple, deep and longitudinal, the inner 

 curving and obsolescent anteriorly and inwardly about the medial con- 

 vexity, not reaching the median line; scutellum black, rufescent medially, 

 very acute, more than twice as long as wide; elytra four time as long as 

 the prothorax and not wider, feebly tapering, smooth, becoming slightly 

 crumpled basally, minutely, sparsely punctured throughout, the im- 

 punctate lines well defined, disappearing posteriorly, the apices obliquely 

 truncate; prosternal patches of the male sharply limited, separated by a 

 narrow parallel line, very coarsely, closely punctate, the interspaces 

 flat and minutely punctulate, the patches not extending posteriorly 

 between the coxae. Length (cf) 36.0 mm.; width 11.2 mm. Mexico 

 (Guerrero), Baron. 



The following may be regarded as a subspecies of pr&stans: 



*Crioprosopus semiplicatus n. subsp. Slightly narrower and more 

 parallel, nearly similar in coloration, except that the metallic lustre of 

 the highly polished elytra is still brighter and deeper green, the red of 

 the under surface paler, the legs relatively darker throughout; head sim- 

 ilar, the antennae much shorter barely longer than the body, the prothorax 

 similar, except that the coarse punctures are still denser, the median line 

 with a transversely rhombiform flat medial dilation, and that the inner 

 of the subbasal impressions does not curve anteriorly and inwardly; 

 elytra similar but more crumpled and rugose basally and with the inner 

 of the impunctate lines less distinct; punctures of the prosternal patches, 

 the latter similarly separated by a narrow parallel line, as coarse as in 

 prcestans but still denser, without flat interspaces and more extended 

 posteriorly, entering somewhat between the coxae; legs more strongly 

 punctured. Length (cf ) 31.0 mm.; width 9.0 mm. Mexico (Guerrero), 

 Baron. 



I am unable to determine just what relationship exists between 

 these two forms but it certainly seems to be of a higher order than 

 individual variation. The inner face of the legs is not thickly 

 clothed with ferruginous hair, as is stated of the Guatemalan iri- 

 descens by White. 



