BEMBIDIIN.E 95 



two-fifths wider than long, the nearly truncate apex, with well de- 

 fined angles, scarcely as wide as the base; sides feebly arcuate, grad- 

 ually slightly sinuate basally, the angles rather obtuse though sharp; 

 margins but finely reflexed; base rather depressed; anterior impres- 

 sion feeble, dilated and transversely rugulose medially, the stria 

 very fine; foveae small, deep, linear, the carina long and distinct; 

 elytra more than one-half longer than wide, scarcely two-fifths wider 

 than the prothorax, subparallel, with feebly arcuate sides, very 

 rapidly rounded at the humeri, the apex circularly rounded, the 

 striae entire but extremely fine, unimpressed, the punctures so fine 

 as to be almost indistinct, larger in the first stria basally. Length 

 (cf ) 3-5 mm.; width 1.35 mm. California (San Francisco). 



curiosum n. sp. 



Body oblong, more or less suboval, of the usual type 13 



13 Sides of the prothorax becoming not very abruptly straight and 

 parallel in basal fifth or sixth 14 



Sides of the prothorax moderately oblique and more or less evidently 

 sinuate basally, but never becoming quite parallel before the basal 

 angles 15 



14 Surface rather convex, deep black and shining, the head distinctly, 

 the pronotum barely, alutaceous; elytra piceous, very feebly and 

 indefinitely paler near the humeri, and with a transverse and irreg- 

 ular, suturally interrupted nubilous rufous fascia at posterior third; 

 under surface black, the epipleura and legs uniform pale piceo- 

 rufous; head three-fourths as wide as the prothorax, hardly as wide 

 as an elytron; sulci very shallow, with their sharp external margins 

 irregularly sinuous; antennae long and slender, blackish, the basal 

 joint rufous, shaded above, the medial joints three times as long as 

 wide; prothorax two-fifths wider than long, the sinuate apex with 

 distinct angles, narrower than the base; sides most rounded at about 

 the middle, straighter anteriorly, broadly and conspicuously re- 

 flexed, finely so at apex; impressions distinct, the stria distinct, lim- 

 ited by them; foveae moderately impressed, in part deeper and ob- 

 liquely sublinear, the carina strong, moderately long; elytra one-half 

 longer than wide, nearly one-half wider than the prothorax, parabolic 

 at apex, wider behind the middle than at base, moderately rounded 

 at the humeri; striae entire, very fine apically, distinct but scarcely 

 impressed anteriorly, the punctures not coarse but distinct, moder- 

 ately separated; foveae small, near basal fourth and apical third, 

 the anterior within large shallow indentations. Length (9) 5-O 

 mm.; width 1.9 mm. British Columbia (Metlakatla), Keen. 



mobile n. sp. 



Surface and coloration nearly as in mobile, the head less alutaceous, the 

 rufous coloration of the elytra very nubilous though traceable in 

 nearly basal half, the apex also more definitely pale; legs and epi- 

 pleura in great part rufous; femora blackish, rufous basally and api- 

 cally; hypomera abruptly rufous faintly so in mobile; head simi- 

 lar but with deeper sulci; antennae almost similar; prothorax nearly 

 similar, except that the widest part, with prominently rounded sides, 

 is slightly before the middle, the apex less sinuate and with blunter 



