2t)0 MANDIBULATA. — COLEOPTERA. 



Mr. Doubleday. " Common at Bottisliam and elsewhere."" — Rev . 

 L. Jenyns. " Newcastle and York." — W. C. Heivitson, Esq. 



Genus CCXXIII. — Hypnoidus, Dilhoyn. 



Antenna short, naked, with the basal joint large, robust ; the second and third, 

 and sometimes the fourth, slender, obconic, of equal length; the remainder 

 compressed, somewhat cordate, shorter than the foregoing ; tbe terminal one 

 obliquely truncate, or somewhat acuminated. Head small, porrect : eyes small : 

 thorax broad, convex, transverse : elytra short, ovate, somewhat convex : body 

 broad, ovate, subglabrous : legs slender ; tarsi simple. 



This genus embraces the smallest species of the family, and will 

 doubtless ere long be formed into two, corresponding with the 

 sections into which I have here thrown them : they may be known 

 by their great comparative width and brevity, the dissimilarity in 

 the structure of the antenna?, transverse thorax, &c. 



A. Antennae with the second, third, and fourth joints small. 



Sp. 1. riparius. Latus, fusco-oeneus, nitidus, antennarum basi pedibusque rufo- 



testaceis. (Long. corp. 2|— 3^ lin.) 

 El. riparius. Fabricius. — N. G. riparius. Steph. Catal. 124. No. 1258. 



Short, broad, above glossy seneous-brown : head punctured, with the front sub- 

 foveolated : thorax broader than long, the disc sparingly punctate and slightly 

 pubescent, the hinder angles elongate, acute, concolorous : elytra short, ovate, 

 with the apex slightly acuminated, regularly striated, the striae impunctate, 

 the interstices flat, scarcely punctured : body beneath pitchy-black, with the 

 apex rather paler : legs rufescent : antennae black, with the basal joints more 

 or less testaceous. 



Rare within the metropolitan district, but abundant in the moun- 

 tainous districts of Wales; also in Norfolk. " Near Barmouth, in 



ISp. 23. fasciatus. Squamosus niger, thorace canaliculato albido variegato, ely- 



tris pallido adspersis, fascidque posticd undulatd pallidd. (Long. corp. 6 



lin.) 

 El. fasciatus. Linne.— Turton (/).— Steph. Catal. 123. No. 1257. 

 Black : thorax channelled, shagreened, and clothed with small silvery scales ; 



elytra varied with white scales, with an undulated whitish fascia of silvery 



ones a little behind the middle. 

 Said by Turton to inhabit Britain, but erroneously. 



