72 MEMOIRS ON THE COLEOPTERA 



Tip of the prosternal process with about six rather long conspicuous setae. 

 Body elongate-elliptic, obtuse behind, pale brownish-testaceous 

 in color throughout, polished and strongly convex; head half as wide 

 as the thoracic base, minutely and sparsely punctulate, smooth; 

 antennae rather long, slender as in Stilbus, the third joint cylindric, 

 not as long as the next two, the fourth and fifth equal; club long, 

 fully as long as the funicle; prothorax barely twice as wide as long, 

 the long and moderately converging sides evenly and not very 

 strongly arcuate; base very feebly margined medially; scutellum 

 transversely triangular, not very finely reticulate; elytra much longer 

 than wide, only a little more than twice as long as the prothorax, 

 the sides slightly converging and rather feebly arcuate to about apical 

 third, very broadly rounded though the apex; surface excessively 

 finely, closely and rather feebly transversely strigilato-reticulate, 

 obsoletely toward base, the series of punctures visible throughout 

 the width, widely abbreviated posteriorly, less so basally, the single 

 stria deep and distinct; mesosternum before the metasternal process 

 large, smooth, gradually declivous anteriorly; prosternal process 

 rapidly expanding apically; post-coxal plaque nearly semicircular; 

 second joint of the hind tarsi more than three times as long as the 

 first. Length 1.7-1.9 mm.; width o. 88-1. o mm. Texas (Brownsville), 

 Wickham rutilans n. sp. 



Tip of the prosternal process with merely a short inconspicuous seta at 

 each angle 2 



2 Form moderately narrow, polished, the elytra feebly opalescent, 

 black or nearly so, the anterior parts rufo-piceous; under surface and 

 legs pale ferruginous; head fully half as wide as the prothorax, the 

 eyes well developed, the surface with minute but clear punctulation; 

 antennae slender, the third joint long and cylindric, not quite as long 

 as the next two, the fourth a little shorter than the fifth; club long, 

 exceeding the funicle in length; prothorax slightly less than twice as 

 wide as long, the strongly converging sides only very feebly arcuate; 

 base finely margined medially; scutellum ogival, more than twice as 

 wide as long; elytra distinctly elongate, barely more than twice as 

 long as the prothorax (9 ), distinctly so and more narrowly rounded 

 at tip (cf), in both sexes with moderately converging arcuate sides 

 and obtuse apex; surface with extremely minute and close-set strigi- 

 lation, obsolescent suturo-basally, the rows of punctures distinct as 

 in the preceding, the intervals with minute scattered punctules, 

 which, toward the sides, assume the crescentic form of the principal 

 punctures; subsutural stria rather coarsely impressed; prosternal 

 process rapidly expanding to the rounded flattened apex, finely 

 beaded at the sides but not at all at apex; metasternum punctate 

 and setulose, smooth anteriorly between the coxae, before which the 

 mesosternum is well developed; post-coxal plaque very short, broadly 

 and continuously rounded; second joint of the hind tarsi scarcely 

 less than three times as long as the first. Length 1.6-1.85 mm.; 

 width 0.78-1.0 mm. Mississippi (Vicksburg). Three examples. 



concinnus n. sp. 



Form narrow, oval, the size very small; color piceous-black, the under 



