568 Coleopterological Notices, IV. 



prominent ; disk completely concealed by a covering of large contiguous 

 scales, which are not even finely parted along the strise. Abdomen densely 

 squamose, middle parts of the third and fourth segments glabrous toward 

 base only. Prosternum not distinctly impressed, separating the small coxse by 

 fully one-half of their own width. Length 3.5-4.7 mm. ; width 1.3-1.7 mm. 



Arizona. 



Somewhat allied to texana, but quite different in its still narrower, 

 cylindrical form and denser vestiture, larger suboval scales which are 

 in close contact throughout, in the smaller and more distant ante- 

 rior coxae and less impressed prosternum. 



In the male there is, at basal third of the abdomen, a small elon- 

 gate-oval flattened area in which the scales become bristling semi- 

 erect and acutely pointed setae. 



Several specimens before me are almost completely denuded, and 

 the pronotal punctures are readily observed to be fine deep and 

 frequently subcoalescent in a longitudinal direction, but not forming 

 rugae like those occasionally seen in mucorea, in which species also 

 the sculpture of this part is much coarser. Anteriorly the constric- 

 tion which is really strong, although not very distinct when nor- 

 mally squamose, is traceable entirely across the dorsal surface, the 

 sculpture in the constriction consisting of strong, longitudinal and 

 coarser rugiform ridges. 



RHOPTOBARIS. 



LeConte— Proc. Am. Phil. Soc, XV, p. 287. 



The single species constituting this genus has nearly all the 

 generic characters of Orthoris, but seems to differ sufficiently in the 

 form and structure of the beak, prosternum and scutellum to fully 

 warrant its generic isolation. 



The beak is rather robust, moderately and evenly arcuate, differs 

 considerably in the two sexes, and is separated from the head by 

 an extremely broad and feeble transverse impression. Epistomal 

 lobe short, limited at each side by a very small oblique fissure, and 

 narrowly and deeply sinuate at the apex. Antennae somewhat 

 slender, the club elongate-ovoidal, densely pubescent and indis- 

 tinctly .annulate, the basal joint composing about one-third of the 

 mass. The mandibles are well developed, arcuate, decussate when 

 closed and deeply notched at apex. 



The prosternum is flat, not distinctly tumid before the coxae and 

 separates the latter by one-third of their own width. Prothorax at 



