AMERICAN COLEOPTERA. 225 



19. B. analis, Lee. New Sp. Col. (Smithsonian 8vo), 52. — Ferruginous, 

 rather shining, head, prothorax and last two dorsal segments blackish-brown ; 

 elytra with suture dusky. Head finely granulate, opake, sparsely not deeply 

 punctured. Prothorax as wide as long, sides feebly rounded for three-fourths 

 the length, then strongly rounded into the base; coarsely not sparsely punc- 

 tured, dorsal line faint. Elytra deeply punctuned. Dorsal segments nearly 

 smooth, ventrals sparsely punctulate. Prosternal sutures nearly parallel with 

 the side margin, which is slightly concave. Length 4 mm; .16 inch. 



%. — Seventh ventral segment with a small triangular apical impression, 

 eighth broadly emarginate. 



9. — Seventh ventral segment sinuate at tip, slightly prominent at the middle, 

 eighth triangularly impressed. 



Illinois and Missouri. 



20. B. nitidicollis, Lee. New Sp. Col. (Smithsonian 8vo), 52. — Dark- 

 brown, anteniue, legs, elytra and tip of abdomen red-brown. Head finely 

 granulated, sparsely punctured. Prothorax polished, coarsely not densely 

 punctured, with a smooth dorsal narrow space, but no impressed line. Elytra 

 strongly punctured. Dorsal segments slightly punctulate, ventrals finely sparsely 

 punctured. Side margin of prothorax acute, flanks feebly concave along the 

 side, episterna trapezoidal, sutures of prosternum, slightly oblique. Length 

 3 mm; .12 inch. 



New York, Michigan and Missouri; many specimens, without sexual 

 difference. The hind angles of the thorax though very obtuse and 

 rounded are perceptible, whereby this species differs from all the fore- 

 going and establishes a transition to the next group. It resembles 

 in fact B. annularis, but differs by the dorsal pfothoracic line being 

 absent; the coxal fissures shorter and not open, and the episterna of 

 the prothorax wider and less concave. 



Group 4. — annularis. 

 In the species of this group the side margin of the prothorax is 

 acute, and the flanks more or less concave along the side ; the fissure 

 of the front coxal cavities is open and large, extending two-thirds 

 way from the coxa to the side ; the prosternal sutures are straight, 

 and the episterna rather narrow and parallel. The mandibles have 

 two acute teeth on the inner side, and the apical part is moderately 

 long and slender. The hind angles of the prothorax are usually very 

 obtuse and rounded, but somewhat apparent, which is not the case in 

 the preceding groups; tliough in other species the sides are rounded 

 into the base without any angles. The frontal suture is usually very 

 fine and trecjuently indistinct, though I have not been able to use 

 this character for specific distinction. 



Head and )>rothorax finely granulate; the former flattened 2. 



Head and prothorax polished; the former convex; epistoma with a small apical 

 tubercle; prothorax without hind angles 12. 



