BEMBIDIIN.E 65 



antennae slender, blackish, the basal joint rufous, three-fourths as 

 long as the elytra, the medial joints scarcely less than three times as 

 long as wide; prothorax scarcely one-half wider than long, 'widest 

 just before the middle, the oblique sides posteriorly becoming sinu- 

 ate, thence parallel and straight for a short distance to the angles, 

 which are right and sharp; base barely at all narrower than the apex; 

 surface smooth, not evidently rugose at base, nearly as in the pre- 

 ceding species, the foveae long, linear and deep, the carina rather 

 long and distinct; elytra three-fifths longer than wide, one-half wider 

 than the prothorax, circularly rounded at tip; striae fine, unimpressed, 

 obsolescent near posterior third, except the first and second, which 

 are entire; punctures fine and widely separated, closer suturad, the 

 seventh stria a series of very minute and remote punctules; foveae at 

 basal and behind apical third. Length (9) 4.2 mm.; width 1.45 



mm. Colorado (Boulder Co.) actuosum n. sp. 



Elytra less elongate, oblong-oval, not maculate 36 



36 Form elongate-suboval, convex, polished black, with feeble aeneous 

 lustre, the elytra nubilously and feebly rufescent basally; under 

 surface black, the legs and epipleura dark rufous; head notably 

 small and with the eyes unusually flat, two-thirds as wide as the 

 prothorax and two-fifths as wide as the elytra, the sulci short, not 

 extending to the apex; antennae black, rufous at base, three-fourths 

 as long as the elytra, the medial joints barely more than twice as 

 long as wide; prothorax two-fifths wider than long, the well rounded 

 sides becoming parallel in about basal sixth, the angles right; base 

 much narrower than the apex; margins moderately reflexed; surface 

 longitudinally rugose at base, with the foveae rather short, oblique and 

 very deep, otherwise as in the preceding species; elytra oval, with 

 arcuate sides, widest at the middle, one-half longer than wide, three- 

 fifths wider than the prothorax; striae not very fine, slightly impressed 

 suturad, excepting the first two obsolescent before the apex; punc- 

 tures small, moderately close-set, those of the seventh series very 

 minute and less close; foveaa as usual nearly at basal and apical 

 third. Length (9) 3-7 mm.; width 1.35 mm. New Mexico. F. 



H. Snow viaticum n. sp. 



Form elongate but more parallel, similarly convex, deep black and pol- 

 ished throughout above, black beneath, the femora nearly pure 

 black, the tibiae and tarsi rufescent; head moderate, with more con- 

 vex eyes, three-fourths as wide as the prothorax and subequal in 

 width to an elytron, the sulci normally long; antennae blackish, 

 piceo-rufous at base, three-fourths as long as the elytra, the medial 

 joints (cf ) nearly three times as long as wide, slightly shorter (9 ); 

 prothorax relatively larger, two-fifths wider than long, the evenly 

 rounded sides abruptly becoming straight and parallel in basal fifth 

 or sixth, the "angles right; surface nearly as in the preceding, the 

 coarsely rugose foveae larger, less definitely linear at the bottom, the 

 carina rather long and distinct; elytra somewhat more than one- 

 half longer than wide, scarcely one-half wider than the prothorax, 

 subparallel, with moderately arcuate sides, broadly parabolic at 

 T. L. Casey. Mem. Col. VIII, Oct. igi8. 



