270 Memoirs on the Coleoptera 



the eyes very slightly more prominent than in nigrinus, the front 

 smooth; antennse evidently shorter than in any of the three pre- 

 ceding forms, though longer than half the body, the individual 

 joints much more abbreviated; prothorax as in nigrinus but a little 

 shorter, the head, neck and prothorax all relatively wider than 

 in that species; elytra a third longer than wide, three-fourths wider 

 than the prothorax, in outline and striation almost as in nigrinus, 

 the striae obtusely impressed and similarly distinct. Length 3.0 

 mm.; width 0.95 mm. California (San Francisco). 



curtipennis n. sp. 



6 — Form narrow, very moderately convex, polished black, the elytra, 

 epipleura and legs piceous; head narrow and elongate-rhomboidal, 

 fully as wide as the prothorax, smooth, the eyes rather well de- 

 veloped but not at all prominent; prothorax small, barely a third 

 wider than long, the sides broadly arcuate, converging from well 

 before the middle, becoming briefly sinuate at the basal angles, 

 which are more than right though sharp and subprominent, barely 

 at all reflexed; anterior impression scarcely evident and only at the 

 middle, the posterior obsolete, the median stria deeply impressed, 

 biabbreviated as usual; elytra two-fifths longer than wide and 

 just visibly more than twice as wide as the prothorax, of the usual 

 outline but without evident striation; dorsal punctures very 

 minute, just before the middle and near apical third. Length 2.5 

 mm.; width 0.75 mm. Texas (Austin). Colorado River of Cali- 

 fornia, — LeConte lucidus Lee. 



Form still narrower and smaller than any other known species, feebly 

 convex, shining, black, the epipleura and legs piceous; head not so 

 elongate, barely longer than wide, rhomboidal, the eyes small, 

 feebly convex; prothorax equal in width to the head, small, only 

 slightly wider than long, the moderately oblique sides from near the 

 apex less arcuate than usual, the hind angles sharply subprominent; 

 transverse impressions very feeble, the anterior nearer the apex 

 than usual, the median stria moderate; elytra almost one-half 

 longer than wide and just visibly less than twice as wide as the 

 prothorax, the sides slightly diverging from the humeri; striae broadly 

 and very feebly impressed though evident. Length 2.0 mm.; 

 width 0.65 mm. Texas (Brownsville); also occurs in Louisiana. 



pusio Lee. 



7 — Form somewhat broader, rather convex, shining, black, the 'egs 

 piceous; head wider than long, sensibly narrower than the pro- 

 thorax, the eyes well developed and notably prominent; front 

 smooth; anterior impressions briefly Unciform, oblique; antennae 

 slender, a little more than half as long as the body; prothorax 

 short and transverse, nearly three-fifths wider than long, widest 

 and inflated well before the middle, the hind angles more than right 

 but sharp and subprominent; impressions moderate, the anterior 

 at a considerable distance from the apex, the stria moderate, im- 

 pressed; base with a feeble median lobe; elytra two-fifths longer 

 than wide, rather convex, subparallel, less than one-half wider than 

 the prothorax, the striae fine but rather sharp, slightly irregular. 



