NORTH AMERICAN COLEOPTERA. I7l 



and the transverse epistomal suture is less obsolete than in 

 alatacea. The sides of the prothorax are very distinctly less 

 strongly arcuate in congener. 



L. COniciventris o. sp. — Oval, atteunated behind, piceo-testaceous, 

 paler beneath; leg« pale brownish-flavate; pubescence extremely fine and 

 sparse; integuments polished. Head not one-half wider than long, feebly- 

 convex, scarcely perceptibly reticulate, excessively minut'ely, feebly and 

 not distinctly punctate; epistomal suture almost completely obsolete. Pro- 

 thorax at apex about equal in width to the head, broadly, feebly, arcuately 

 sinuate, fully one-half wider than long; at base broadly truncate, very 

 feebly sinuate on each side of the scutellum, nearly two and one-half times 

 as wide as long; sides evenly and distinctly arcuate; disk broadly convex, 

 polished, scarcely perceptibly reticulate, excessively minutely, feebly punc- 

 tate; punctures somewhat irregularly disposed, very sparse. Scutellum 

 very small, more than twice as wide as long, triangular. Elytra at base 

 scarcely as wide as the prothorax; sides strongly convergent, nearly straight 

 to the apex, which conjointly is abruptly and transversely truncate, one-half 

 as wide as the elytral base; outer angles rounded, inner very narrowly so; 

 disk rather strongly, conically convex, smooth; coarsely, very finely retic- 

 ulate, not perceptibly punctate; one-third longer than wide, two and one- 

 half times as long as the prothorax^ Seventh segment broad, broadly 

 rounded behind; eighth having two equal apical seta. Posterior femora 

 very strongly compressed. Length 1.0 mm. 



Texas; (Austin 1). 



The labrum is more continuous in curvature with the 

 epistoma, and is consequently more prominent from above 

 than in the other species; it appears from above to be 

 transversely subtruncate or very broadly rounded, but when 

 viewed in prolongation of the axis of the insect it is seen to 

 have the lower edge rather abruptly deflexed, and broadl}', 

 rather feebly sinuate. 



The general outline of this species is very different from 

 that prevailing in the genus, but it appears to possess all 

 the generic characters of Limnox^haris. It is decidedly the 

 smallest species described. 



SILPHA Linn. 



S. aenescens ^- sp.— Form rather depressed, elongate, oval, black; upper 

 surface with a bright aeneous lustre; legs and antennae black throughout; 

 shining; pubescence in the form of an excessively minute and almost invis- 



