BEMBIDIIN^E 25 



Elytra more oblong-oval, with more arcuate sides and gradually and sub- 

 circularly or parabolically rounded behind in apical two-fifths.. . .15 



15 Antennae shorter, three-fourths as long as the elytra, with the medial 

 joints not more than twice as long as wide. Body not broadly 

 oblong-oval, moderately convex, black, polished, the upper surface 

 with faint subviolaceous lustre; head relatively large, four-fifths as 

 wide as the prothorax and fully as wide as an elytron, the sulci 

 rather shallow', the superciliary puncture moderate; palpi black, 

 moderate in length; prothorax short, slightly more than one-half 

 wider than long, widest well before the middle, the sides anteriorly 

 rather strongly rounded, strongly oblique and nearly straight in 

 almost basal half, the angles obtuse but not rounded and feebly 

 prominent; surface laterally at base with fine radiating regulosity, 

 very deeply impressed at some distance from each carina, the inter- 

 vening surface flat; sides broadly reflexed, the apical angles obtusely 

 rounded; elytra one-half longer than wide, a third wider than the 

 prothorax, somewhat parabolic behind, the striae very fine, suben- 

 tire, slightly impressed internally, obsolete externally, the large im- 

 pressed foveae near three-sevenths and two-thirds. Length ( 9 ) 4.2 

 mm.; width 1.5 mm. California (Placer Co.) lividulum n. sp. 



Antennae longer, the medial joints about three times as long as wide. . . 16 



16 Habitus somewhat as in the preceding, the body not very broad, 

 oblong-oval, deep black, the polished upper surface without metallic 

 lustre; head moderate, three-fourths as wide as the prothorax and 

 scarcely so wide as an elytron, the sulci broad, the orbital puncture 

 moderate; prothorax short, more than one-half wider than long, 

 the sides broadly, evenly arcuate from the obtuse apical, to the 

 obtuse but sharp basal, angles, straight and slightly more oblique 

 basally; surface laterally at base finely rugose, the impression dis- 

 tant from the carina and only moderate in depth; median stria 

 coarse and deep, as in the preceding, and similarly not entire; elytra 

 nearly one-half longer than wide, two-fifths wider than the pro- 

 thorax, the apex more obtusely and circularly rounded than in 

 lividulum, the striation nearly similar, the large deep foveae at three- 

 sevenths and three-fourths. Length (cf) 4.0 mm.; width 1.6 mm. 

 Colorado. Levette collection . improvisum n. sp. 



Habitus very different, larger, the .body broadly oblong-oval, with much 

 less transverse prothorax, deep black, the upper surface obscure 

 viridi-aeneous, faintly greenish beneath, the entire legs deep black; 

 head three-fourths as wide as the prothorax, scarcely as wide as an 

 elytron, with broad sulci and large orbital puncture; antennae three- 

 fourths as long as the elytra; prothorax large, evidently less than 

 one-half wider than long, widest near apical third, but with broadly 

 rounded sides, becoming straight basally, the apical angles but 

 slightly blunt, the basal obtuse but sharp; base barely wider than 

 the apex, the sides broadly reflexed; surface laterally at base broadly 

 rugose, the impression distant from the long carina, broad and shal- 

 low; median stria not very coarse; elytra large, one-half longer than 

 wide, two-fifths wider than the prothorax, gradually and subpara- 

 bolically rounded behind, the striae fine and feebly impressed, every- 



