BEMBIDIIN.E 157 



width; sides strongly rounded anteriorly, becoming straight and 

 parallel in basal sixth; foveae deep, elongate-oval, adjoining the mod- 

 erately distinct carina; punctures of the subbasal row coarse and 

 distinct; median line generally more deeply impressed before and 

 behind the middle; elytra distinctly less than one-half longer than 

 wide, evidently wider behind the middle than at base, fully four- 

 fifths wider than the prothorax; sides rather strongly arcuate, some- 

 what rapidly rounding at the humeri; striae coarse but not much 

 impressed, obsolete in apical third or fourth; punctures coarse, deep, 

 separated by rather more than their diameters; seventh series 

 strong, extending to the middle; foveae at two and four sevenths. 

 Length (cf 9 ) 2.3-2.6 mm.; width 0.7-0.9 mm. Rhode Island to 

 Illinois, Iowa and Missouri (St. Louis). Abundant. . .frontale Lee. 



Form not quite so ventricose, more parallel, nearly as convex, polished, 

 deep black, the elytra not paler, with the posterior spot smaller, 

 more marginal, united with the pale margin connecting it with the 

 pale apex; legs piceo-testaceous; head barely visibly narrower than 

 the prothorax, throughout nearly as in frontale; antennae slightly 

 shorter than the elytra, black, gradually pale basally, the medial 

 joints twice as long as wide; prothorax shorter, two-fifths wider than 

 long, in general outline and arcuato-truncate apex nearly as in 

 frontale, but with the anterior impression sharper, deeper and entire 

 from side to side, the subbasal impression deeper and more sharply 

 groove-like, strongly punctate, the foveae and carina nearly similar, 

 but the abbreviated median stria is even throughout and moderately 

 impressed; elytra more oblong, with more parallel and feebly arcuate 

 sides, less than one-half longer than wide and only two-thirds wider 

 than the prothorax; striae not so coarse and continuing to apical 

 fourth or fifth, the punctures smaller though very distinct, more 

 close-set; foveae nearly similar. Length (d 71 9 ) 2.25-2.5 mm.; width 

 0.75-1.0 mm. California (Gualala River, Mendocino Co.) and 

 Nevada (Reno). Four examples siticum n. sp. 



Form nearly as in siticum but more elongate, shining, brown in color in 

 the type, with nearly similar posterior maculation; legs rufous; 

 head distinctly narrower than the prothorax; antennae fuscous, 

 gradually testaceous basally, shorter than in either of the two pre- 

 ceding, scarcely three-fourths as long as the elytra, the medial joints 

 evidently less than twice as long as wide; prothorax still more trans- 

 verse, rather more than two-fifths wider than long; base narrower 

 than the apex and fully three-fourths the maximum width; sides 

 strongly rounded in anterior, oblique and sinuate in about posterior, 

 half, becoming parallel in basal fifth; anterior impression shallow 

 but evident, the posterior shallowly sulciform and punctate; foveae 

 shallower than in the preceding, the carina moderate, close to the 

 edge; elytra longer, fully one-half longer than wide, scarcely more 

 than one-half wider than the prothorax, subparallel, with feebly 

 arcuate sides, rapidly rounded at the humeri; striae moderate, obso- 

 lete in apical fourth, barely impressed suturad, the punctures strong, 

 even, moderately well separated, traceable to about posterior third; 



