BEMBIDIIN.E 209 



joints one-half longer than wide; prothorax a little less than one-half 

 wider than long, the sides broadly, subevenly rounded and finely 

 reflexed almost throughout, becoming very faintly sinuate toward the 

 slightly obtuse angles, the apices of which are minutely acute and 

 prominent, only slightly reflexed, the seta on the edge very little in 

 advance of the angle; subbasal stilcus rather fine, deep, the surface 

 thence to the base slightly tumid; elytra fully three-fourths longer 

 than wide, scarcely over a third wider than the prothorax, circularly 

 rounded in barely apical third, the parallel sides just visibly arcuate; 

 pedicel less than half the basal width; first and second striae very 

 shallow, feeble, subequal in depth, the others not observable; an- 

 terior fovea small, at three-sevenths. Length 2.2 mm.; width 0.62 



mm. California (San Diego) esurialis n. sp. 



Form shorter and stouter than in the preceding, oblong-suboval, moder- 

 ately convex, shining, micro-reticulate, black to piceous in color, the 

 legs piceous; head distinctly narrower than the prothorax, the eyes 

 well developed and prominent; antennae slender, piceous, fully three- 

 fourths as long as the elytra, the medial joints twice as long as wide; 

 prothorax somewhat more than one-half wider than long, equally 

 wide at base and apex, the sides moderately rounded, oblique and 

 nearly straight posteriorly, the angles obtuse, slightly prominent at 

 tip and distinctly reflexed; subbasal impression deep, sulciform; 

 median stria well impressed; elytra barely one-half longer than wide, 

 about one-half wider than the prothorax, evenly parabolic in apical 

 third, the parallel sides feebly arcuate; striae one to three or four 

 detectible, though feeble even near the suture; anterior fovea slightly 

 ante-median. Length 2.2 mm.; width 0.78 mm. California (Yuma 

 Reservation; two females taken by the writer) and Utah (south- 

 western; one female taken by Mr. YVeidt) corax Lee. 



It is possible that the species described above under the name 

 funebris, may be one of those confounded with corax by Hayward, 

 but, though the basal angles of the prothorax are more than right, 

 their apex is more acutely prominent, and the sides of the base 

 seem to be truly transverse and not oblique, as they are very ob- 

 viously in corax; besides this, the entire form of the body is strik- 

 ingly different, funebris being parallel, with the elytra but slightly 

 wider than the prothorax. 



The four species from litoralis to torrescans constitute a well dif- 

 ferentiated section of the subgenus, characterized, among other 

 ways, by the feebly serrate or crenulate margin of the elytra toward 

 the humeri; litoralis bears no resemblance in any particular to the 

 much larger 3 mm. pallidus of Chaudoir, to which it was as- 

 signed by Horn, followed by Hayward, although pallidus, because 

 of its general characters, probably belongs to the subgenus Isotachys. 

 T. L. Casey, Mem. Col. VIII, Oct. 1918. 



