144 CASEY 



in injiatus^ almost eqiiilatero-triangular ; elytra evidently less than 

 one-half longer than wide, not at all wider than the prothorax, 

 the sides parallel and but very feebly arcuate, the apex very obtusely 

 rounded, the tip angular; surface with moderate, deep and per- 

 forate, rather sparse punctures, which are not notably smaller on 

 the posterior declivity, the latter not differing in lustre, shining ; 

 prosternum deep black, strongly punctured, the process rather 

 short and somewhat strongly constricted, rounded, not margined 

 even at the sides ; abdomen rather finely and sparsely though 

 strongly punctate. Length 8.0 mm. ; width 4.2 mm. Nevada 

 (near Reno), — H. F. Wickham ampliatus n. sp. 



5 — Elytra with very small hairs observable posteriorly. Body oblong, 



stout, convex, deep black, the legs and antennas dark rufous, the 

 surface only feebly shining ; head finely, closely punctate, espe- 

 cially anteriorly, the sinus moderately deep, broadly angular, the 

 lobes broadly rounded ; prothorax twice as wide as its median 

 length, the sides evenly rounded and converging anteriorly, becom- 

 ing parallel in about basal half, the apex deeply and evenly sinuate, 

 three-fourths as wide as the base, the angles deflexed, right and 

 not rounded ; base transversely rectilinear, curving rather abruptly 

 to the rear near the sides, the angles rather prominent posteriorly 

 and not blunt ; surface strongly and closely punctate, becoming 

 more coarsely and still more closely so laterally, the bead very fine ; 

 scutellum moderate, sharply equilatero-triangular ; elytra less than 

 a third longer than wide, equal in width to. the prothorax, the sides 

 parallel and straight, rounding to the very acutely ogival tip in 

 apical two-fifths ; surface but slightly uneven, rather coarsely, 

 deeply, moderately closely and conspicuously punctate, the punc- 

 tures very close laterally, becoming smaller only very near the 

 acute tip ; prosternum strongly but not densely punctate, the pro- 

 cess unmargined ; abdomen not coarsely but strongly, somewhat 

 closely punctured. Length 6.6 mm. ; width 3.1 mm. Colorado 

 (central). \^=- Coniontis obesa Lee] obesus Lee. 



Elytra completely glabrous, the setje so minute as to be invisible under 

 moderate power 6 



6 — Form oblong, rather more elongate than in obesus ^ similar in 



coloration and slightly more shining ; head similarly punctured 

 and almost equally short and transverse, the sinus smaller and still 

 feebler, the lobes very broadly rounding and scarcely differentiated 

 from the rounded sides, similarly with a very faint emargination 

 at the ends of the oblique sutures ; prothorax similar but less trans- 

 verse, not more than four-fifths wider than long, similarly punc- 

 tured and even more closely toward the sides ; scutellum similar 

 though notably smaller ; elytra similar though a little more elon- 

 gate, the punctures sensibly less close-set and decidedly less coarse ; 

 under surface nearly similar throughout. Length 5.8-6.75 mm. ; 

 width 2.8-3.2 mm. Montana (Helena) subglaber Csy. 



Form similar to that of subglaber^ deep black, more or less alutaceous, 



