American Caraboidea 267 



head three-fourths as wide as the prothorax; antennae three-fifths 

 as long as the body, feebly incrassulate distally, fuscous, the first 

 five or six joints flavate; prothorax one-half wider than long, the 

 sides strongly rounded anteriorly, rather deeply sinuate for a short 

 distance before the basal angles, which are sharp and laterally 

 prominent; margins very finely reflexed, the deplaniture at the 

 angles more gradual and less well defined than in the preceding 

 forms; transverse impressions obsolete, the median stria deep and 

 rather coarse; elytra subparallel, with arcuate sides, two-thirds 

 wider than the prothorax, the stride very fine and extremely feeble; 

 dorsal punctures not clearly visible. Length 2. 65-2. S mm.; width 

 0.85-1. 1 mm. Rhode Island. Four examples biplagiatus Dej. 



Head relatively larger but with decidedly smaller and less conspicuously 

 prominent eyes, piceous-black and polished; humeral pale area 

 extending a little behind basal third at the sides, the inner ramus 

 long, longitudinal and extending through three-fifths; under surface 

 as in the preceding, the meso- and metasterna, but not the para- 

 pleura, also pale as in biplagiatus; head nearly four-fifths as wide 

 as the prothorax, as long as wide, smooth, with two feeble impres- 

 sions at the epistomal suture; antennae slender, two-thirds as long 

 as the body, fuscous, the first six joints flavate; prothorax shorter, 

 rather more than one-half wider than long, widest well before the 

 middle, but with more evenly rounded sides than in biplagiatus, the 

 basal sinus deep, the angles sharp and laterally somewhat prominent; 

 margins and impressions nearly similar, the median stria finer; 

 elytra parallel, with arcuate sides, three-fifths wider than the pro- 

 thorax, the striae fine and very feebly impressed, the dorsal punctures 

 extremely small and feeble. Length 2.7-2.9 mm.; width i. 0-1.2 

 mm. California (San Francisco to Los Angeles)., .demissus n. sp. 



6 — ^Body very small in size, moderately shining, flavate in color, the 

 under surface of the hind body sometimes more piceous; head 

 infuscate, narrow, elongate, with rather long neck, three-fourths as 

 wide as the prothorax, the eyes small, very moderately convex; 

 front smooth; antennae flavate, three-fifths as long as the body; 

 prothorax a third wider than long, widest anteriorly, with evenly 

 rounded and very finely reflexed sides, converging posteriorly, 

 rather deeply sinuate before the acute and laterally rather prominent 

 angles; surface at the angles slightly deplanate, elsewhere convex, 

 smooth, the anterior impression, medially, and the posterior sulcus 

 both distinct, the stria deeply impressed; elytra two-fifths longer 

 than wide, feebly inflated posteriorly, four-fifths wider than the 

 prothorax, feebly convex, the striae shallow and broadly impressed, 

 the dorsal punctures minute and feeble, scarcely discoverable. 

 Length 2.65 mm.; width i.o mm. California (San Francisco and 

 Marin Co.) fusciceps Lee. 



Body decidedly larger and with the lustre and coloration subsimilar; 

 head larger, four-fifths as wide as the prothorax and not longer 

 than wide, the neck shorter; eyes not so small and evidently more 

 prominent; surface not so smooth, minutely, sparsely punctulate; 

 antennae nearly similar; prothorax larger, less abbreviated, a fourth 



