1902.] NATURAL SCIENCES OF PHILADELPHIA. 75 



impi-e.«sious feeble ; basal iinpres-sions moderately deep and rather 

 sharply defined, imi-striate ; sides narrowly reflexed, arcuate iu 

 front, oblique and straight behind ; hind angles obtuse, not 

 rounded, and without trace of carina ; smooth and convex between 

 basal impressions and margins. 



El}'tra oblong- oval, one-half wider than thorax, slightly more 

 than one-half longer than wide, striate; stria? abbreviated, except 

 the first and sometimes the second, seventh represented at tip by a 

 short groove, strongly and rather coarsely i)unctate to posterior 

 third, then impunctate ; third striae with first dorsal puncture one- 

 third from base, the second about one -third from apex ; intervals 

 nearly flat. Beneath "and femora black, tibiae and tarsi slightly 

 piceous. Length 4 mm. 



Diagnostic characters. — Resembles recticolle iu general form and 

 should follow it iu our lists. 



Eeadily recognized by the form of the basal impressions, absence 

 of carinse, shorter antennae, and the elytral striae being obsolete 

 and impunctate in basal third. 



Described from a series of twelve specimens collected in Hum- 

 boldt county, C'al., by Dr. Van' Dyke. 

 Bembidium vandykei n- sp. 



Form rather broad, elongate, scarcely depressed; color nigro- 

 piceous, more or less tinged with bluish, especially the head aud 

 pronotum ; surface smooth and shining. 



Head slightly wider than thorax at aj^ex ; antenna? reaching to 

 first dorsal punctures of elytra. 



Prothorax about one-third wider than long, length equal to width 

 of base, base equal to apex ; base very feebly arcuate ; apex slightly 

 emarginate ; median line impressed, abbreviated in front, extending 

 nearly to base; transverse impressions distinct, anterior angulate 

 and feeble; basal impressions moderately l)road, deep and bistriate; 

 sides arcuate iu anterior three-fourths, sinuate behind, nearly par- 

 allel for a short distance in front of hind angles, which are rectan- 

 gular and feebly (.-arinate. 



Elytra about one-half wider than thorax and about one-half 

 longer thau wide, oblong-ovate, finely striate ; strije entire, impunc- 

 tate, fifth strongly grooved at tip ; third stria witli first dorsal jiunc- 

 ture one-eighth of the length of elytra in front of middle, the 

 second one-fourtli from apex; intervals flat. 



