Coliopterological Notices^ VI. 665 



basal impression strong, tlie post-scutellar narrow and distinct, the omoplates 

 rather prominent; punctnres minute and very sj)arse even toward base; ves- 

 titure sparse thronghont, coarser and cinereous toward base. Abdomen pol- 

 islied, sparsely pubescent, the legs long and slender. Length, 2.4-2.9 mm.; 

 width 0.7-0.85 mm. 



California (southern). Mr. H. C. Fall. 



In the male the fifth ventral is unmodified, very broadly rounded 

 behind, the genital segment as usual broadly, feebly sinuato-trun- 

 cate. This species is allied to the two preceding, but differs from 

 both in its much narrower form of body and more elongate and 

 slender antennje; from nitiduhis it diff"ers also in color, relatively 

 much smaller and narrower prothorax, larger head and stronger 

 subbasal impression of the elytra, and, from asjierulus, in its 

 very much sparser elytral punctures, among other features. 

 Three specimens. 



12. L.. oriiatelllis n. sp. — Narrow, polished, black or blackish, the legs 

 concolorous; antennie testaceous toward base; elytra with the basal margin pale; 

 pubescence fine and very sparse, dark in color and entirely inconspicuous, ex- 

 cept in basal third of the elytra, where it becomes cinereous and coarser but 

 not denser. Head about as long as wide, convex, minutely, remotely punc- 

 tate, rounded at base, the tempora moderately long with obtusely rounded 

 angles; eyes modei'ate in size, prominent; autennaj one-half as long as the 

 ])ody, moderately slender, very feebly incrassate, the tenth joint distinctly 

 longer than wide, the eleventh as long as the preceding two in the male. Pro- 

 Ihorax rather large, quite distinctly narrower than the head and longer than 

 wide, strongly convex, minutely, remotely punctate throughout, the anterior 

 lobe distinctly transverse, widest behind the middle, the posterior lobe two- 

 fifths of the total length, with the sides feebly divergent and straight to the 

 ])ase; margin flat, the collar wide and distinct. Elytra not quite twice as long- 

 as wide, two-thirds wider than the prothorax, slightly dilated behind the 

 middle, the sides thence distinctly convergent to the narrowly subtruncate 

 apex; scutellar impression broad, the omoplates large and distinct, the trans- 

 verse impression subobsolete; punctures minute and sparse throughout, only 

 slightly more distinct toward base. Abclomm polished, sparsely pubescent, 

 the legs slender. Length 2.4 mm. ; width 0.7 mm. 



Arizona (near the Grand Canon). Dr. Prudden. 



The male has the fifth ventral broadly and just visibly sinuate 

 at apex, the genital segment feebly sinuato-truncate. Three speci- 

 mens. 



This is the only bicolored species which has the pale area of 

 the elytra confined to the base, and not extending behind the 

 omoplates. 



