4l8 CASEY 



laterally, the sutural impressions toward tip feeble ; abdomen finely, 

 closely punctate and opaque. Length 9.5 mm.; width 4.3 mm. 

 Arizona (near Tu9son) contaminans n. sp. 



10 — Body small, narrowdy fusiform, strongly convex, polished, 

 scarcely duller behind ; head as in contaminatts but with the 

 deflexed tip of the epistoma more obtusely rounded and the sculp- 

 ture less coarse ; prothorax rather less than two-fifths wider than 

 long, the apex barely three-fourths as wide as the base, evenly and 

 feebly though distinctly sinuate, with the angles obtuse and blunt, 

 the sides rather strongly arcuate at apical third, becoming more 

 converging and straight thence to the apex, straight posteriorly to 

 the basal angles ; surface not impressed though with close and 

 smaller punctures basally near the sides and with a pronounced 

 fine groove along the basal margin, except medially, the punctures 

 impressed, only moderately fine but sparse medially, becoming 

 coarser and closer laterally and dense near the sides, the disk with a 

 small impunctate area before the middle near each outer fourth and 

 another on the median line near the base, somewhat as in densi- 

 ventrt's., the scutellum and elytra nearly as in coiitajuitiaus^ the 

 former larger, the latter more irregular in surface, with the punc- 

 tures coarser and more widely impressed though almost as sparse, 

 but little coarser or less sparse laterally, the humeri more rounded 

 and not exposed at base; abdomen finely, densely punctate and 

 opaque but with the second segment, in the unique type, more ele- 

 vated than the others, less densely and more coarsely punctate and 

 more shining, — probably an abnormality. Length 9.0 mm.; 

 width 4.0 mm. Texas (El Paso) amplexa n. sp. 



II — Form rather stout, oval, moderately convex, polished throughout, 

 dark rufo-castaneous in color, the minute hairs inconspicuous ; 

 head with small, very remote punctures, becoming a little larger 

 and less sparse in the intra-carinal depressions, rather close on the 

 epistoma ; prothorax transverse, one-half wider than long, the 

 apex three-fourths as wide as the base, evenly and feebly but 

 perceptibly sinuate, with the angles but little more than right and 

 slightly blunt, the sides feebly, subevenly arcuate to the apical 

 angles, becoming straight toward base, the punctures fine and very 

 sparse medially, then, separated by a longitudinal impunctate area, 

 becoming coarse and less sparse to the upper part of the shallow 

 lateral declivity, on which the punctures are rather coarse and 

 close-set; scutellum well developed, tumid, wider than long, 

 broadly angulate behind ; elytra slightly widest behind the mid- 

 dle, rather rapidly and acutely ogival, with the surface moderately 

 declivous, behind, the sides broadly arcuate, a little more rounded 

 basally, the humeri very narrowly exposed at base, with the callus 

 strong, the surface even, coarsely, sparsely punctured, not more 

 coarsely and but little less sparsely, the punctures more uneven in 

 size with smaller punctures intermingled, laterally; abdomen only 

 moderately finely, densely and strongly punctate and feebly shin- 

 ing. Length 1 1 .0 mm. ; width 4.71;; mm. Arizona (Tu9son), — 

 H. F.Wickham sublaeviceps n. sp. 



