BEMBIDIIN/E 115 



tinct carina; elytra one-half longer than wide, wider posteriorly 

 than at base, the sides only just visibly arcuate, rapidly rounding 

 at the humeri, parabolic in apical third, barely a third wider than 

 the prothorax; stria? fine, unimpressed, gradually attenuate and obso- 

 lete scarcely behind the middle, the punctures very fine and remotely 

 separated throughout; foveae extremely small, before basal and behind 

 apical third. Length (9) 3.3 mm.; width 1.2 mm. Colorado 

 (Boulder Co.). Mrs. T. L. Casey. Two examples. 



perturbatum n. sp. 



Prothorax relatively smaller, at its widest part narrower than the ely- 

 tral base 50 



50 Form oblong, moderately convex, very highly polished, black, with- 

 out decided metallic lustre; legs piceous; head very moderate, not 

 three-fourths as wide as the prothorax and not quite as wide as an 

 elytron, the eyes only moderately prominent; sulci narrow, parallel; 

 antennae black, thick and short, two-thirds as long as the elytra, the 

 medial joints evidently less than twice as long as wide; prothorax 

 barely two-fifths wider than long, distinctly narrower at base than 

 at apex, the sides rather strongly and evenly rounded to the straight 

 parallel basal part, which is nearly a fifth the total length; anterior 

 impression feeble, the posterior wide but evident, more or less feebly 

 and remotely punctulate, the stria very fine; foveae punctate, broadly 

 and irregularly impressed, the carina strong and distinct; elytra 

 fully one-half longer than wide, parallel, with feebly arcuate sides, 

 gradually parabolic behind, nearly one-half wider than the prothorax; 

 striae very fine, unimpressed, obsolete barely behind the middle, the 

 punctures very fine and remotely separated throughout, somewhat 

 less remote but not larger in the sutural series; foveae very small, 

 near basal and apical two-sevenths. Length (cf 9 ) 3-35-3-5 mm.; 

 width 1.3-1.35 mm. Idaho (Cceur d'Alene), Lt. Jas. A. Leyden. 



agitabile n. sp. 



Form, coloration and lustre nearly as in agitabile, similarly convex and 

 highly polished, having a very faint subaeneous lustre; legs piceo- 

 rufous, the femora darker; head larger, with larger though only 

 slightly more prominent eyes, more than three-fourths as wide as 

 the prothorax and rather wider than an elytron, the antennae black, 

 longer, the medial joints fully twice as long as wide; prothorax fully 

 two-fifths wider than long, but little narrower at base than at apex, 

 the sides regularly and strongly arcuate, becoming more briefly sub- 

 parallel at base; surface nearly similar, the foveae smaller, very deep, 

 better defined, oval, separated from the distinct carina; elytra simi- 

 lar but only about two-fifths wider than the prothorax, the similarly 

 very fine and unimpressed striae continuing rather more evidently 

 behind the middle and with the punctures, though fine, more dis- 

 tinct than in agitabile and somewhat less widely separated; foveae 

 extremely small, before basal and near apical third. Length (c/ 1 ) 

 3.6 mm.; width 1.35 mm. Oregon (Bull Run, Clackamas Co.), 

 Mrs. Kermack atrolucens n. sp. 



51 Form rather narrow, strongly convex, polished throughout, black, 

 with aeneous lustre anteriorly, the under surface piceo-rufous and 



