BEMBIDIIN-4E 39 



ifornia (north of San Francisco). The description is drawn from 



the female adjutor n. sp. 



4 Elytra notably short, only about a third longer than wide. Black, 

 polished throughout, without trace of metallic lustre, the legs pale 

 brown, the femora piceous, paler basally; head small, though three- 

 fourths as wide as the prothorax, the sulci deep and alutaceous; 

 antenna? blackish, the basal joint and apex of the second and third 

 pale, subequal in length to the elytra, the medial joints between 

 two and three times as long as wide; prothorax one-half wider than 

 long, the sides inflated and evenly rounded nearly to the base, where 

 they become oblique and broadly, feebly sinuate, the angles rather 

 obtuse but not rounded; surface moderately convex, the transverse 

 impressions evident, the stria entire; foveae large and shallow, rugu- 

 lose, the carina moderate; elytra two-thirds wider than the prothorax, 

 oblong, parallel, with broadly arcuate sides and very obtusely 

 rounded apex in less than posterior third; stria? strongly impressed, 

 especially internally, everywhere very conspicuous; foveae well de- 

 veloped, at two-fifths and four-fifths. Length (cf ) 3-O mm.; width 

 1.25 mm. California (Hoopa Valley, Humboldt Co.) 



curtulatum n. sp. 



Elytra always distinctly more than a third longer than wide .5 



5 Dorsal foveae of the elytra large and deeply impressed. Body oblong- 

 suboval, very moderately convex, shining, black, with feeble aeneous 

 lustre above, black beneath, the legs black; head well developed, 

 four-fifths as wide as the prothorax, the sulci broad; antennae black, 

 rather slender, three-fourths as long as the elytra, the medial joints 

 evidently more than twice as long as wide; prothorax two-fifths to 

 one-half wider than long, the sides strongly rounded, oblique and 

 sinuate basally, the angles right or rather more, sharp; sides some- 

 what widely but not strongly reflexed; transverse impressions very- 

 feeble, the stria limited by them ; foveae large, rugose, shallow, linearly 

 deeper at their middle at base, the carina moderate; elytra one-half 

 longer than wide, three-fifths wider than the prothorax, rounded in 

 apical third, the feebly arcuate sides subparallel; margin incurved 

 at base to the fourth stria, the striae fine but deeply impressed at 

 least suturally, the foveae unusually approximate, barely before the 

 middle and at apical fourth. Length (6 cf, 4 9) 3-3-3-7 mm.; 

 width 1.3-1.45 mm. British Columbia (Metlakatla and Inverness), 



Keen planiusculum Mann. 



Dorsal foveae small, or at least not widely impressed as in planiusculum. .6 

 6 Body more elongate, the prothorax only a fourth wider than long. 

 Depressed and shining, black, without metallic lustre, the legs pice- 

 ous; head fully four-fifths as wide as the prothorax, the sulci broad, 

 alutaceous, not very deep; antennae long, piceous-black, four-fifths 

 as long as the elytra, the medial joints nearly four times as long as 

 wide; prothorax evenly and distinctly rounded at the sides, the latter 

 converging and broadly, distinctly sinuate posteriorly, the angles 

 right or slightly more and sharp; stria deep and subentire, the trans- 

 verse impressions subobsolete, the margins strongly reflexed; foveae 

 large, shallow, rugulose, deep medially at base, the carina long, dis- 



