Coleopterological Notices. Ill 



stability in the variations observed, it is impossible to specifically 

 divide the large amount of material before me. 



OLIBROPORIJS 11. gen. 



Base of the antennae entirely exposed in deep frontal emarginations just 

 before the eyes. Scutellum small. Elytra with a single discal stria, the 

 sutural head completelj' wanting. Prosternal process rather narrow, abruptly 

 intlexed at apex, the latter not setose. Mesosternum forming a minute bead 

 along the ajsex of the very broad, transversely truncate metasternal process, 

 the latter not advancing beyond the coxae, the mesosternum not developed 

 behind the middle acetabula, forming merely a beaded margin. Legs short 

 and robust ; terminal spurs of posterior tibiae small, slender, slightly unequal ; 

 posterior tarsi moderate, cylindrical ; basal joint obliquely truncate and pro- 

 longed beneath the second, the articulation rigid ; second joint moderate in 

 length, scarcely twice as long as the first. 



These few words will serve to characterize a genus intermediate 

 in some characters between Stilbus and Olibrus, and combining also 

 several of the structural features of other genera. The apex of the 

 prosternal process is more abruptly inflexed than is usual in Olibrus, 

 but the edge is not as free and acute as in Stilbus. 



O. piliictatus n. sp. — Rather broadly, evenly elliptical, convex, strongly 

 shining, black above, rufo-testaceous throughout beneath ; antennae same. 

 Head short, very minutely, rather feebly punctate ; eyes large, not margined 

 internally ; antennae moderate, third joint nearly as long as the next two, club 

 large, longer than the funicle, elongate-elliptical, strongly compressed, the 

 eleventh joint but slightly longer than wide, one-half longer than the tenth, 

 the terminal process not well defined and obtusely rounded. Prothorax very 

 short, almost three times as wide as long, strongly narrowed from base to apex ; 

 sides arcuate and continuous in curvature with those of the elytra ; basal lobe 

 almost obsolete ; basal bead fine, very strong and continuing to within a very 

 short distance of the basal angles, the posterior margin of the basal bead finely 

 granulato-aciculate ; disk very minutely, feebly and not very densely punc- 

 tate, the punctures rather larger and denser near the lateral edges ; the latter 

 margined with a broad flattened bead which becomes very M^ide around the 

 apical angles. Scutellum very small, slightly wider than long, pointed ; sides 

 broadly arcuate. Elytra more than three times as long as the prothorax, not 

 narrowed toward apex, the latter very broadly, evenly rounded ; transverse 

 basal stria fine, deeply impressed, abruptly ending at the base of the scutellum, 

 which it attains, but at which point it is not in the least reflexed ; anterior half 

 of the basal bead — formed by the basal stria— longitudinally granulato-acicu- 

 late ; discal stria very deeply impressed, coincident with the suture at the 

 apex, and very gradually evanescent at basal fourth, becoming an unimpressed 

 row of punctures ; disk rather coarsely reticulate in transverse wavy lines, 



