BEMBIDIIN.E 55 



and foveae nearly as in the preceding. Length (9 ) 4.25 mm.; width 



1.65 mm. New Mexico (Las Vegas) porrectum n. sp. 



16 Form oblong-suboval, rather convex, deep polished black, the legs 

 black; head moderate, not quite as wide as an elytron; antennae 

 unusually short for the present subgenus, three-fourths (cf ) to two- 

 thirds ( 9 ) as long as the elytra, deep black, the medial joints barely 

 twice as long as wide; prothorax a fifth to third wider than long, 

 subparallel, the sides well rounded anteriorly, oblique in about basal 

 half, becoming very feebly sinuate near the angles, which are sharp 

 and slightly more than right; margins unusually finely reflexed; sur- 

 face convex, smooth, with feeble transverse impressions and incom- 

 plete stria; foveae nearly smooth, sublinear, deep, beyond lateral 

 fourth, the carina wanting; elytra fully one-half longer than wide, 

 one-half wider than the prothorax, parallel, the feebly arcuate sides 

 rapidly rounded at base, parabolic behind; striae impressed sutur- 

 ally, the punctures strong and well separated, both striae and punc- 

 tures wholly obsolete in apical third suturally, to half or more later- 

 ally; foveae near basal and apical third. Length (cf 9 ) 3.3-4.2 mm.; 

 width 1.25-1.4 mm. California (northern coast regions). Eleven 



specimens humboldtense Blaisd. 



17 Striae of the elytra entire in great part 1 8 



Striaa abbreviated more or less at apex. 26 



1 8 Body depressed above, as much so as in the planatum group. Head 

 and pronotum black, with greenish lustre; elytra uniformly pale cas- 

 taneous throughout; under surface rufo-piceous, the abdomen and 

 legs rufous; apical margin of each segment of the former black; head 

 four-fifths as wide as the prothorax, not quite as wide as an elytron, 

 shining, the sulci wide and deep'; antennae red-brown, testaceous at 

 base, nearly three-fourths as long as the elytra, the medial joints 

 more than three times as long as wide; prothorax not quite one-half 

 wider than long, the sides widely and strongly reflexed, rounded 

 anteriorly, converging and distinctly sinuate behind, the angles 

 right; stria fine but well impressed, subentire; foveae large, slightly 

 rugulose, deeply and linearly impressed medially, the carina rather 

 long but fine; elytra barely one-half longer than wide, one-half wider 

 than the prothorax, obtusely ogival behind, the sides parallel, very 

 feebly arcuate, rapidly rounded basally, the humeri widely exposed 

 and transverse at base; striae deeply impressed, finely, rather feebly 

 punctate, the seventh wholly wanting, the sixth obsolete, barely 

 traceable as a very fine line under certain angle of reflection. Length 

 (9 ) 5.2 mm.; width 2.0 mm. New York (Catskill Mrs.). 



vulsum n. sp. 



Body similar in depression and coloration to the preceding but narrower 

 and more parallel, with relatively much larger prothorax, polished; 

 head well developed, with prominent eyes and deep sulci; antennae 

 piceous, the two basal joints testaceous, long, slender, filiform, not 

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

 long as wide; prothorax nearly as in vulsum but relatively much 

 larger and barely two-fifths wider than long, differing greatly in 

 having the oblique sides posteriorly not sinuate, the basal angles 



