BEMBIDIIN/E 23 



striae well separated; dorsal foveae small, before anterior and at pos- 

 terior third. Length (d 71 9 ) 3.4-4.2 mm.; width 1.4-1.65 mm. 

 California (Truckee and Lake Tahoe). Ten examples. 



commotum n. sp. 



Head rather larger, about as wide as an elytron; antennae, palpi and ely- 

 tra longer, the latter oblong, parallel, with nearly straight sides, 

 rapidly rounding and very obtuse in about apical third; body 

 broader, oblong, similarly colored and lustrous, but with the legs 

 rufo-piceous; antennae black, slender, longer than in commotum, 

 four-fifths as long as the elytra, the medial joints more than twice 

 as long as wide; maxillary palpi black, distinctly longer than in any 

 other of this section; head fully three-fourths as wide as the pro- 

 thorax, which is one-half wider than long, widest before the middle, 

 the sides rather strongly rounded, oblique behind, just visibly sinu- 

 ate at the hind angles, which are obtuse though not rounded; sur- 

 face as in the preceding, the side margins distinctly reflexed; elytra 

 large, rather more than one-half longer than wide, two-fifths wider 

 than the prothorax, the strife very fine, all unimpressed, not quite 

 entire, the minute punctures widely separated, closer in the inner 

 series as usual. Length (cf ) 4.0 mm.; width 1.65 mm. California 

 (Placer Co.). One specimen seclusum n. sp. 



II Sides of the prothorax distinctly sinuate basally, becoming parallel 

 for a rather long distance before the basal angles, which are right 

 and very sharp. Form oblong-oval, black, polished, subaeneous, 

 the elytra somewhat piceous-black; legs black, the trochanters pale; 

 antennae slender, the second joint almost four-fifths as long as the 

 third, the medial joints two and one-half times as long as thick; 

 head nearly four-fifths as wide as the prothorax, the eyes large and 

 prominent, the sulci moderately abrupt and deep; prothorax one- 

 half wider than long; 'sides moderately inflated and evenly rounded 

 to the large basal sinus, the stria deep, not attaining the apex, the 

 foveae deeper than in others of this section, the surface between the 

 lineate bottom and the carina strongly rugose; elytra one-half longer 

 than wide, subacutely rounded in posterior two-fifths, two-fifths 

 wider than the prothorax, oblong-oval, parallel, the striae fine, very 

 feebly impressed inwardly and entire, barely traceable externally, 

 the foveae broadly impressed, just before the middle and behind 

 apical third, mutually as distant as the second is fro.ni the apex. 

 Length (9) 4.2 mm.; width 1.65 mm. British Columbia (Metla- 

 katla), Keen blanditum n. sp. 



Sides of the prothorax more or less oblique posteriorly, but never more 

 than broadly and feebly sinuate 12 



12 Basal angles right or extremely nearly so, very sharp, the sides of 

 the prothorax broadly and feebly sinuate posteriorly 13 



Basal angles more or less evidently more than right, though always 

 sharply defined, the thoracic sides oblique basally and nearly 

 straight 14 



13 Form oblong-oval, shining, black, with feeble aeneous lustre, the 

 elytra not deep black; legs black, the coxae and trochanters paler; 

 antennae black, slender, not quite as long as the elytra, the medial 



