Coleoi)terological Notices. 6*7 



Group 5. — cordatus. 



A rather limited group containing the smallest species of the 

 genus, polished, sometimes dull, black, with the elytra always pale, 

 \yhite or yellowish-white, clouded toward suture and base with 

 brown, piceous or black : — 



dimidiatiis Lee. tiirbulentus n. sp. 



basalis Lee. opaculus Lee. 



iguayus n. sp. eordatus Say. 



misellus n. sp. forcipatus Lee. 

 neglectus n. sp. 



B. igiiavtis n. sp. — Slender, rather convex, parallel, black; elytra very 

 pale, whitish, translucent, indefinitely clouded with piceous toward suture 

 and at the base ; legs piceous, tibiae and tarsi flavate ; antennae flavate, pice- 

 ous toward apex ; integuments polished throughout, head and jjrothorax very 

 finely reticulate, the reticulations on the latter tending to a transverse arrange- 

 ment ; abdomen more coarsely reticulate, the lines very fine. Head distinctly 

 narrower than the prothorax, very convex, neither tubereulate nor foveate, 

 rather finely, distinctly and sparsely punctate ; antennal tuberculations ex- 

 tremely small and feeble ; epistomal sutui-e very fine, feeble, not impressed ; 

 anterior angles of the epistoma very minutely but acutely and distinctly tuber- 

 eulate ; antennae rather short, gradually and very strongly incrassate ; second 

 joint robust, longer than the next two together ; three to six small, sixth 

 strongly transverse, eighth twice as wide as long, shorter than the ninth and 

 tenth which are rather strongly transverse, eleventh ovate, scarcely longer 

 than wide. Prothorax as wide as the elytra, nearly one-half wider than long ; 

 sides in apical two-thirds parallel and very nearly straight, then very broadly 

 rounded into the base, without lateral or basal angles ; base subtransverse in 

 the middle ; apex broadly evenly and just visibly arcuate ; apical angles right 

 and narrowly but distinctly rounded ; disk rather strongly, evenly, trans- 

 versely convex, very finely, evenly and sparsely punctate ; median groove very 

 fine but distinct, not quite attaining the apex. Ehjtra quadrate, about two- 

 thirds longer than the prothorax ; sides nearly parallel and straight ; outer 

 angles very broadly rounded, inner narrowly but distinctly so ; surface not 

 distinctly impressed near the base, rather coarsely, very feebly and somewhat 

 densely punctate, the punctures separated by their own widths. Abdomen 

 slightly narrower than the elytra ; sides parallel and feebly arcuate ; surface 

 finely, sparsely punctate, beneath vei-y minutely and sparsely punctate. 

 Length 1.9 mm. 



Rhode Island. 



The hypomera are flat but depressed below the lateral edges 

 which are, therefore, finely prominent ; the coxal fissures are very 

 short and narrowly open, the sutures obsolete The mentuni is 



