NORTH AMERICAN COLEOPTERA. 257 



Central Illinois 1; Mr. F. M. Webster. 



The scales are generally white, but are slightly; 

 darker along the flanks of the elytra, where they are very 

 small. The rows of scales upon the elytral intervals are 

 not uniformly single or double, but in many spots become 

 more crowded and irregular. 



RENOCIS n. gen. (Hylurgini). 



Body subcylindrical. Head prominent, not concealed by the prothorax, 

 inserted in the prothorax nearly to the eyes; slightly deflexed, not at all 

 produced, beak entirely obsolete; eyes rather finely granulated, not at all 

 prominent, on the sidfs, extending slightly under the head, short, very 

 strongly transverse, with a small feeble sinuation in the anterior margin; 

 untennaB inserted on the sides of the head just before the eyes, short, ten- 

 jointed; basal joint longer than wide, rather robust; second not one-half as 

 long, subglobular; three to six very small; joints seven to ten forming a very 

 abrupt, elongate, oval club, longer than the entire preceding portion, strongly 

 compressed, sparsely pubescent. Mandibles prominent, short and stout, 

 perfectly chisel-shaped apex transversely truncate, straight; inner face at 

 apex obliquely truncate. Mentum short, transverse; maxillas, ligula and 

 palpi very small, invisible under a mass of coarse hair surrounding the men- 

 tnm. Labrum wanting. Anterior coxte prominent, subglobular, contiguous; 

 middle coxse widely distant, small, not prominent; posterior separated, 

 transverse, attenuated laterally, only attaining the metasternal episternum, 

 which is long, rather wide; sides parallel; epimeron not visible. Anterior 

 coxEe in contact with the head beneath; prosternum entirely obselete before 

 them; femora rather robust, simple; tibiao very narrow at base, rapidly 

 dilated and compressed toward apex, margined externally with a row of short, 

 very robust spiuules, obliquely truncate at apex; tarsi rather short, slender, 

 not at all dilated but rather compressed, five jointed; third obliquely truncate 

 !iud slightly produced beneath, not bilobed; fourth very minute; fifth slender, 

 linger than the preceding united. Abdominal segments five in number; first 

 two subequal, each nearly as long as the third and fourth together. Elytra 

 covering the entire abdomen; pygidium invisible; prothorax strongly rounded 

 at the sides, transverse, convex; sides continuous in curvature from the 

 dorsal surface to the anterior coxae. Integuments covered with a dense 

 scabrous mass of scales; base of elytra elevated and tuberculate. Scutellum 

 not distinctly visible. 



In this genus the antennal club is strongly compressed, 

 elongate-oval, obtusely pointed and four-jointed, the joints 

 being connate and separated by straight traris verse sutures. 

 Both surfaces are glabrous, except the apices of the joints. 



