284 CUKCULIOXID^E. [LeConte. 



RHINONCUS Sch. 



The species of this genus have the broad stout form usual in the tribe, 

 and only differ from Pelenomus by the prosternum being deeply emargi- 

 nate in front, with distinct antecoxal ridges. 



The middle coxae are normal in position, their cavities being formed 

 equally by the meso- and metasternum, whereby it differs notably from 

 Coelogaster; it also differs from that genus by the eyes, which are rounded 

 and convex, as in the other genera, and without any trace of superciliary 

 ridge. 



The funicle of the antennae is 7 -jointed, and the claws cleft are in our 

 species. 



1. B. pericarpius Gyll., Sch. Cure, iv, 582; Curculio peric. Linn., 

 Syst. Nat. 12th, ii, 609; Fabr., Ent. Syst. i, 2d, p. 408; et auctorum plu- 

 rimorum; Ceutorhynchus triangularis Say, Cure. 20; ed Lee. i, 286. 



Abundant in Europe; Lake Superior, Indiana, Pennsylvania, Kansas; 

 easily known from our other Ceutorhynchoids by the larger size and con- 

 spicuous elongate sutural white spot at the base of the elytra. The pro- 

 thorax is very coarsely punctured, feebly channeled, and the lateral tuber- 

 cles are not very distinct. Length 4 mm. ; .16 inch. I do not know why 

 Gemminger and Harold have referred Say's description to PhytoMus. 



2. R. pyrrhopus Boh., Sch. Cure, viii, 2d, 172. 



Middle and Western States, to Colorado. Smaller, clothed above with 

 coarser brown pubescence, and beneath with white scales. The prothorax 

 is feebly channeled, and the lateral tubercles are acute. The antennse and 

 legs are fulvous yellow. The elytra are marked with a similar elongate 

 basal white or yellowish spot, which, however, is sometimes not very ap- 

 parent. Length 2.3 mm. ; .09 inch. 



3. B. longulus, n. sp. 



Elongate, black or dark brown, thinly clothed with small white scales; 

 more dense, forming a short posterior dorsal line on the prothorax, and an 

 elongate sutural spot at the base of the elytra. Head and beak densely 

 punctured, the latter stout, not longer than the head. Prothorax not wider 

 than long, slightly narrowed in front, feebly rounded on the sides, coarsely 

 and densely punctured; slightly channeled near the base; tubercles entire- 

 ly wanting. Elytra wider than the prothorax, elongate-oval, convex, hu- 

 meri oblique; striae deep, punctured, interspaces flat, densely rugose. An- 

 tennse and tarsi testaceous. Length 2.5 mm.; .10 inch. 



Southern and Western States; Florida to Illinois; Gilroy, California. 

 Remarkable for its elongate form, and the absence of prothoracic tubercles. 

 The eyes are round, and barely touch the prothorax in repose. The ante- 

 coxal ridges are very strong, but the prosternum is hardly emarginate in 



front. 



Tribe XIX. u vui M. 



An important type of Curculionidce, containing numerous genera and 

 groups, of which only a few are represented in our fauna. It is in this 



