94 Memoirs on the Coleoptera 



3 — Sides of the prothorax oblique but straight basally; body similarly 

 rather depressed and deep black throughout; head large, fully as 

 wide as long, with the eyes large but only moderately convex, very 

 much less prominent than in the preceding, fully four-fifths as wide 

 as the prothorax; surface in great part smooth and shining, strigilate 

 anteriorly; antennae very slender, the third joint a little longer 

 than the fourth as usual in this genus; prothorax nearly one-half 

 wider than long, the sides as in bembidioides, except that the promi- 

 nence before the middle is much less pronounced; angles obtuse and 

 distinct but not at all prominent, the seta similarly on the edge at 

 the angle; base fully as wide as the apex, laterally less oblique than 

 in the preceding, the surface smoother, the fine close strigilation 

 rather less pronounced; anterior discal foveae deep, the impressions 

 and foveae nearly similar; elytra not quite one-half longer than wide, 

 one-half wider than the prothorax, in outline nearly similar, though 

 much less elongate and with the apex less abruptly obtuse, with the 

 sinus shorter and much feebler; surface sculpture and lustre nearly 

 similar, the basal margin in like manner rather deeply sinuate, 

 joining the side margin in an even curve; tarsi very slender. Length 



(9 ) 6.0 mm.; width 2.2 mm. Colorado monticola n. sp. 



Sides of the prothorax oblique basally and becoming distinctly sinuate 

 toward the angles, which are sharp, subprominent and more nearly 

 right; coloration, lustre and sculpture nearly similar; head in 

 form, size and in the only very moderately prominent eyes, as in 

 monticola, but having the entire surface strigilate, the lines radi- 

 ating from a short incised medio-frontal line; palpi with the fourth 

 joint more conspicuously longer than the third; antennae slender 

 but rather more incrassate distally than in bembidioides, half as long 

 as the body to a little less; prothorax shorter, two-thirds wider than 

 long, nearly similar in general outline, the finely reflexed sides 

 much less reflexed at base than in that species, the base similarly 

 unmargined, fully as wide as the apex and arcuately oblique at the 

 sides; impressions almost obsolete, the stria fine; foveae similarly 

 indefinite and shallow, the anterior discal foveae smaller; surface 

 flatter, the confused strigilation stronger and more evident; elytra 

 nearly similar but less strongly mottled with velvety black, the 

 general lustre less aenescent, the apex more abruptly obtuse, with 

 the sinus much deeper and more conspicuous, although the sutural 

 tips are similarly rounded and not in the least subangulate, as they 

 are in bembidioides. Length (cf' 9 ) 5.6-6.2 mm.; width 2.1-2.3 

 mm. Mexico (Colonia Garcia, Sierra Madre Mts., Chihuahua), — 



Townsend *coloiiica n. sp. 



4 — Dorsal punctures of the elytra four to six in number ■' • • • 5 



Dorsal punctures very minute and only three in number 7 



5 — Prothorax in outline nearly as in the preceding section, the basal 

 angles obtuse but distinct and sharply defined. Body smaller, 

 deep black and shining above and beneath, the legs, palpi and 

 antennae black, the upper surface with extremely feeble subaeneous 

 lustre; pronotum opaque laterally; head smaller, fully as wide as 

 long, at least three-fourths as wide as the prothorax, smooth, the 



