CETONIIN/E 343 



leucosticta; the description of Horn would seem to indicate that 

 the sides of the prothorax were more evidently angulate and the 

 base at the sides less reflexed in the Maryland specimen of the 

 Ulke collection, upon which his description was founded, and the 

 thoracic base in that specimen is said to be feebly emarginate 

 medially; it is transversely truncate here; the figure on the plate 

 indicates a more elongate body, with relatively larger head and 

 prothorax in the Maryland specimen, which doubtless represents 

 the typical leucosticta. 



Genuchinus Westw. 



In many respects this genus comes much closer to the preceding 

 than to any other, having the same uniform slope of the upper sur- 

 face of the head from the base to the reflexed clypeal apex, but 

 here the body is very elongate, depressed above, with the elytra 

 opaque except on the flanks; the mentum is much less transverse, 

 more pointed behind and nearly flat, reflexed posteriorly as in 

 Psilocnemis, but it is always distinctly sculptured in rugulose lines; 

 its lateral sinus is more evident. The anterior tibiae are straight, 

 slender and normally bidenticulate and the tarsi are longer, with 

 freely articulated joints; the first antennal joint is rugulose and 

 nearly flat on its outer face. The species may be known as follows: 



Elytra distinctly cuneiform; prothorax transverse, nearly one-half wider 

 than long. Body black, feebly shining; form relatively elongate; 

 head coarsely and closely variolate-punctate; occiput not trans- 

 versely compressed; front flat, the clypeus narrowly reflexed; pro- 

 thorax broader than long, the general form hexagonal; anterior angles 

 slightly acute, the posterior obtuse; surface feebly convex, with very 

 coarse, moderately deep and rather close-set punctures; elytra with 

 the flat discal part having very elongate variolate foveae, the sides 

 very coarsely punctured; pygidium with coarse variolate punctures; 

 legs ambulatorial, relatively slender, the anterior tibiee bidentate 

 near the tip, the middle and posterior toothed at the middle and 

 with coarse teeth around the apex; tarsi nearly as long as the tibiae, 

 cylindric ; under surface very coarsely but sparsely punctate. Length 

 12.5 mm. Arizona, L. E. Ricksecker. A single example. [ Cre- 

 mastocheilus ineptus Horn] ineptus Horn 



Prothorax much less transverse, never more than a fifth or sixth wider 

 than long, with a dense line of tomentum along each side but abbre- 

 viated anteriorly; elytra parallel or nearly so and with minute 

 scattered points of tomentum, particularly evident along the upper 

 part of the flanks. Body very slender, black, rather shining, ex- 

 cepting the opaque flat discal part of the elytra, which is devoid of 



