I 



BEMBIDIIKLE 75 



with broadly arcuate sides, rather gradually rounded at the humeri, 

 fully two-fifths wider than the prothorax; striae somewhat fine and 

 not evidently impressed, gradually disappearing near the tip, the 

 punctures not coarse or very deep; foveae near three and five sev- 

 enths. Length (cf ) 5.2 mm.; width 1.85 mm. Colorado. Levette 

 collection. A single example lepusculus n. sp. 



56 Antennae not so long, not over twice as long as the thoracic width, 

 the medial joints distinctly less than three times as long as wide. 

 Body of smaller size, but unusually diversified in this respect, col- 

 ored as in tetracoluni and ustulatum, except that the head and pro- 

 notum are dark piceous and not black; head moderate, very much 

 narrower than an elytron, the antennae testaceous throughout; pro- 

 thorax a third to two-fifths wider than long, widest barely before the 

 middle, the evenly and strongly rounded sides becoming rather grad- 

 ually parallel in basal fifth or sixth, the base slightly depressed and 

 feebly punctulate, the foveae large, deep, sublinear, the carina dis- 

 tinct; elytra shorter than in the others of this subsection, one-half 

 longer than wide, parallel, with rather distinctly arcuate sides, about 

 one-half wider than the prothorax, the striae feebly impressed, grad- 

 ually evanescent on the declivity, the punctures moderate in size 

 and separation, the seventh stria a distinct series of fine and more 

 remote punctures; foveae near basal and behind apical third. Length 

 (c? 9 ) 3.8-5.6 mm.; width 1.4-1.9 mm. Illinois (Highland Park), 

 Colorado (Boulder Co.), Wyoming (Cheyenne), Utah, Nevada 

 (Reno) and New Mexico. Abundant. Thirty-seven specimens. 



lucidum Lee. 



Antennae longer, with the medial joints fully three times as long as wide, 

 usually more than twice as long as the thoracic width; body larger 

 in average size 57 



57 Prothorax smaller, the elytra longer than in the allied species, with 

 subentire striae. Elongate and only moderately convex, shining as 

 usual, black or feebly picescent, with greenish lustre anteriorly, the 

 pale castaneous elytra marked near the humeri and posteriorly as 

 in tetracohim; legs rufous; head four-fifths as wide as the prothorax, 

 with prominent eyes, slightly narrower than an elytron; prothorax 

 two-fifths wider than long, widest and with the sides subprominently 

 rounded just before the middle, the sides rather abruptly parallel 

 in basal sixth, the angles right; base but slightly narrower than the 

 apex; surface nearly as in lucidum, the base but feebly depressed, 

 the lineate deeper part of the foveae more oblique; elytra fully three- 

 fifths longer than wide, parallel, with feebly arcuate sides, rather 

 gradually rounding at the humeri, very gradually parabolic behind, 

 three-fourths wider than the prothorax; striae rather fine and very 

 feebly impressed, subentire, the punctures small and somewhat 

 close-set; seventh series only distinct in basal half; foveae at two-fifths 

 and two-thirds. Length (cf 9 ) 5.2-5.5 mm.; width 1.95 mm. New 

 Mexico (Las Vegas). Three examples castalium n. sp. 



Prothorax larger, the elytra broader, with the striae obsolescent near the 

 apex 58 



58 Body oblong, moderately convex, shining, black, the anterior parts 



