American Caraboidea 269 



elytra not quite one-half longer than wide, the sides barely at all 

 arcuate, evenly and moderately diverging from the humeri; apex 

 truncate, the external angle moderately rounded; striae broadly, 

 very feebly impressed and subobsolete. Length 2.65-3.3 mm.; 

 width 1. 0-1.2 mm. Utah (southwestern), Idaho (Coeur d'Alene), 

 Wisconsin and Iowa to New York and Massachusetts. [Dromins 



angustus || Lee] linearis Lee. 



Surface sim larly colored and shining, smaller in size; head relatively 

 larger, as wide as the prothorax, nearly smooth, with a small central 

 fovea or impression; eyes at about their own length from the base; 

 antennae moderately slender, over half as long as the body; pro- 

 thorax a third to two-fifths wider than long, four-sevenths as wide 

 as the elytra, in outline nearly as in the preceding, the basal angles 

 even more distinctly acute and prominent; impressions faint, the 

 stria deeply impressed and biabbreviated; elytra shorter, two-fifths 

 longer than wide, in general outline and sculpture nearly similar. 

 Length 2.6-3.0 mm.; width 0.9-1.0 mm. Nevada (Reno) and 



California (Lake Tahoe and Humboldt Co.) prominulus n. sp. 



4 — Antennae long and slender, much more than half as long as the body. 



California 5 



Antennae shorter, half as long as the body, the individual joints much 



more abbreviated; size much smaller. Sonoran regions 6 



5 — Body smaller and narrower than in linearis, rather depressed, shining, 

 black, the legs piceous; head smooth and rhomboidal, just visibly 

 narrower than the prothorax, the latter a third wider than long, 

 widest anteriorly, the sides broadly arcuate, oblique behind, the 

 angles minutely prominent; margins as in the preceding species; 

 impressions obsolete or very feeble, the surface smooth as usual; 

 median stria rather coarsely and deeply impressed, biabbreviated; 

 elytra nearly one-half longer than wide, the sides very feebly arcu- 

 ate, slightly diverging; surface depressed, the striae broadly, feebly 

 impressed but evident. Length 2.75-3.0 mm.; width 0.85-1. 1 mm. 

 California (Sta. Clara to Sonoma). Rather abundant. 



nigrinus Mann. 

 A — Similar to nigrimis but somewhat larger and more convex, the 

 head not so narrow, as wide as the prothorax, with the eyes 

 distinctly larger and relatively somewhat less prominent; pro- 

 thorax shorter, fully two-fifths wider than long; elytra wider and 

 more convex, very smooth, the striae subobsolete, barely glimpsible 

 in part by oblique light. Length 3.4 mm.; width 1.15 mm. 



California (San Francisco) fretus n. subsp. 



B — Similar to nigrimis and with the head notably narrow and the 

 antennae long and slender as in that and fretus, but with the 

 prothorax shorter, nearly one-half wider than long; elytra as in 

 nigrinus in outline, about one-half longer than wide, narrower 

 and more elongate than in fretus, rather convex, smooth, the striae 

 obsolescent as in fretus. Length 3.25 mm.; width 1.05 mm. 

 California (Port Harford, S. L. Obispo Co.). . . .obispinus n. subsp. 

 Body still smaller and with evidently shorter elytra, shining, black, the 

 legs piceous; head rhomboidal, barely narrower than the prothorax, 



