Coleopterological Notices, IV. 569 



base quite perceptibly narrower than the elytra. Scutellum trian- 

 gular, flat, nearly as long as wide, deeply and densely sculptured 

 like the surrounding surface of the elytra and not impressed. The 

 legs are moderately long, the tarsi slender, the ungues well developed 

 and unusually thick, as in Orthoris. 



The oblique pygidium of Rhoptobaris and Orthoris appears to 

 indicate a certain affinity with the Centrini, and, although this 

 character occurs also in the Barini proper, it would seem more 

 natural to place these genera as near the Centrini as possible. The 

 elongate antennal club, also, is more of a centrinide than a baride 

 character, it being highly developed for example in Cylindrocerus. 



1 Rhoptobaris canescens Lee. — Proc. Am. Phil. Soc. XV, p. 287. 



Elongate-oval, black throughout and strongly convex, subopaque, 

 the elytra less densely sculptured and a little more shining, the 

 vestiture consisting of very short, moderately dense setae, giving a 

 gray pruinose appearance to the surface. The beak is rather stout, 

 distinctly arcuate, one-third longer than the prothorax in the male, 

 but nearly one one-half longer than the latter in the female and 

 distinctly more slender ; antennae inserted slightly beyond the mid- 

 dle, the funicular joints small and subequal, the club elongate, fusi- 

 form, abrupt, very densely pubescent, not distinctly annulate, a little 

 shorter than the funicle in the male, but fully as long as the latter 

 in the female. Prothorax in the male two-fifths wider than long 

 with the sides strongly convergent from base to apex and evenly 

 moderately arcuate throughout, not in the least constricted, in the 

 female scarcely perceptibly wider than long, the sides being very 

 feebly convergent from base to apex ; disk without impunctate line, 

 finely and very densely punctate throughout. Elytra in both sexes 

 abruptly and quite distinctly wider than the prothorax, and, in the 

 male, nearly three times as long as the latter, in the female not 

 quite two and one-half times longer, the striae deep and abrupt, not 

 very coarse, the intervals about three times as wide as the striae, 

 finely, confusedly and very densely punctate throughout. The male 

 is much larger and more robust than the female, and has, at the 

 apex of the fifth segment, a short obtusely rounded dentiform lobe. 

 Length 3.4-4.0 mm.; width 1.3-1.6 mm. 



Colorado. Of the habits of this interesting species I believe 

 nothing has been recorded. 



