306 MEMOIRS ON THE COLEOPTERA 



longer than wide, equal in width to the prothorax, rather obtusely 

 rounded behind; striae strong and impressed (cf 1 ), less coarse and un- 

 impressed (9), distinctly coarser on the declivity, the scutellar 

 moderate, oblique; intervals convex (cf ), especially toward the sides, 

 or flat ( 9 ). Length (cf 9 ) 7.6-8.5 mm. ; width 3.2-3.6 mm. Cal- 

 ifornia (near San Francisco). Four examples diffidens n. sp. 



Form narrower than in conflata and smaller in size, elongate-suboval, 

 convex, deep black throughout and shining, the female elytra feebly 

 alutaceous; micro-reticulation of the male elytra almost obliterated; 

 head not so large as in the two preceding, but fully half as wide as 

 the prothorax, the eyes rather prominent; strioles coarse, deep and 

 oblique; antennae piceous, the two basal joints bright testaceous, 

 the third feebly clouded apically, moderate in length; prothorax 

 two-fifths to one-half wider than long, the sides differing from those 

 of the two preceding in being almost evenly and moderately arcuate 

 from base to apex, gradually subparallel basally, the posterior punc- 

 ture coarse, very slightly nearer base than side; apex and general 

 surface as in the preceding, the inner fovea a fine incised line, the 

 outer sublinear but feeble and postero-laterally oblique, sometimes 

 wholly obsolete; elytra fully one-half longer than wide, a little more 

 in the male, more gradually rounding behind, barely at all wider 

 than the prothorax; striae fine but sharp, coarse on the declivity, 

 the scutellar long, oblique; lateral series narrowly interrupted medi- 

 ally; intervals almost perfectly flat throughout in both sexes. 

 Length (cf 9 ) 8.0-8.7 mm.; width 3.3-3.6 mm. Idaho (Coeur 

 d'Alene), Jas. A. Leyden leydeni n. sp. 



24 Scutellar stria very short, isolated; body small in size, with prom- 

 inent eyes. Black, with the upper surface polished, bronzy-aeneous; 

 tibiae and tarsi obscure rufous; head half as wide as the prothorax; 

 antennae moderate; prothorax barely two-fifths wider than long, the 

 sides very moderately, subevenly arcuate, becoming gradually sub- 

 parallel basally; apex two-thirds as wide as the base, deeply sinuate, 

 with very prominent, slightly blunt angles; basal angles right, nar- 

 rowly rounded, the puncture evidently nearer base than side; im- 

 pressions obsolete, the stria very fine; foveae completely obsolete; 

 base gradually strongly sinuate laterally; elytra not quite one-half 

 longer than wide, about as wide as the prothorax, gradually round- 

 ing at the sides behind the middle; lateral series abruptly and rather 

 widely interrupted; striae fine but sharp and deep, impunctate, a 

 little coarser behind, the seventh distinct; intervals feebly convex 

 in the male; under surface wholly punctureless as usual in this sec- 

 tion. Length (c?) 6.0 mm.; width 2.35 mm. Pennsylvania. 



enervis n. sp. 



Scutellar stria rather long, more or less oblique; body moderately large, 

 the eyes less prominent 25 



25 Body moderately stout, elongate-suboval, convex, obscurely bronzed 

 above, the under surface greenish-black; legs obscure rufous, the 

 femora black; head small, distinctly less than half as wide as the 

 prothorax, the eyes moderately convex, the posterior superciliary 

 puncture small, not half as large as the anterior; strioles fine and 



