76 PROCEEDINGS OF THE ACADEMY OF [Feb., 



First two joints of anterior tarsi dilated ; the first oblong Avith 

 inner angle feebly produced, the second feebly dilated with inner 

 angle large and produced. Legs piceous. Length 5-6.3 mm. 



Diagnostic characters. — Its resemblance to planatum; prothorax 

 wider in comparison to its length ; irapunctate strise ; smaller size ; 

 more slender form and slightly more convex elytra. Should follow 

 planatum in the list. Named from a series of specimens collected 

 in Mendocino coimty, Cal., by Dr. Edwin C. Van Dyke. 



Bembidium falsum n. sp. 



Form oblong-ovate, elongate, depressed ; color nigro-piceous, 

 faintly tinged with bluish ; surface smooth and more or less extremely 

 finely reticulate. 



Head about as wide as thorax at middle ; anteuure reaching to 

 anterior dorsal punctures. 



Prothorax one-fifth to one-fourth of its width wider than long ; 

 slightly narrower at base than apex ; base about equal to the length, 

 and very feebly arcuate ; apex slightly emarginate ; median line 

 impressed at middle and subentire ; transverse impressions distinct, 

 the anterior feeble ; basal impressions moderately broad, deep, 

 bistriate; sides arcuate in anterior three-fourths, sinuate behind, 

 parallel for a short distance in front of basal angles, which are rec- 

 angular and feebly carinate. 



Elytra about one-half wider than thorax, and about Iwo-thirds 

 longer than wide, oblong, sides nearly parallel ; strongly striate ; 

 strise entire, impunctate, fifth strongly grooved at tip ; third stria 

 with first dorsal pimcture just slightly in front of the middle, the 

 second one-fourth from apex ; intervals convex. Legs piceous ; 

 anterior tarsi with first two joints dilated; the first oblong with 

 inner angle produced, the second transverse, feebly dilated with 

 inner angle large and produced. Length 5.5-6 mm. 



Diaf/nostic characters. — Resembles planiusculum, from which it 

 may be recognized by its larger head, elongate and parallel form, 

 and deeper elytral stripe. It can precede the latter species in our 

 lists. 



Described from a series of specimens taken in Mendocino county, 

 Cal., by Dr. Van Dyke. 

 Sembidium Buspectum n. sp. 



Form moderately broad, rather convex; color nigro-seneous ; 

 elytra ])iceo-jencous with })aler spots arranged as follows : a small 



