CERAMBYCID.E 243 



stronger, except in obsoleta, the apical abdominal sinus of the male 

 more abruptly formed and distinctly deeper 8 



8 Elytral punctures moderate, becoming fine, "feeble, asperulate and 

 unusually close-set toward apex. Body and elytra black throughout; 

 legs pale testaceous, the tarsi piceous distally, the femora black at 

 tip; head unusually small, very finely, sparsely punctate throughout; 

 antennae missing in the type; prothorax moderate, scarcely as long 

 as wide, a little wider than the head, strongly narrowed and abruptly 

 deeply constricted at apex, the prominences almost completely 

 obsolete, the surface between them not at all concave, finely, sparsely 

 punctate, with the usual impunctate line: elytra subparallel, one-half 

 wider than the prothorax and four times as long, rounding apically, 

 the truncatures transverse; abdomen very finely, rather closely punc- 

 tulate. Length (9) 7-8 mm.; width 2.6 mm. Colorado. Levette 

 collection obsoleta n. sp. 



Elytral punctures less close-set and not or very feebly asperate toward 

 tip 9 



9 Punctures of the head coarse, deep and very close-set except medially. 

 Body rather stout, shining and deep black throughout, the legs, 

 elytra and antennae wholly black; pubescence sparse, fulvescent, less 

 abbreviated than usual and, on the prothorax, rather long and very 

 obvious; head in outline as in the two preceding, the antennae (cf ) 

 slender, nearly four-fifths as long as the body; prothorax fully as 

 long as wide, much narrowed and deeply constricted at apex, very 

 finely and sparsely punctate, the prominences feeble, the surface 

 not concave between them; elytra barely one-half wider than the 

 prothorax and between three and four times as long, moderately 

 cuneiform, the apical truncatures straight, slightly oblique; punctures 

 moderate in size, deep, subperforate, not at all asperate posteriorly 

 and everywhere unusually close-set, becoming dense and separated 

 by their own diameters, to but little more, on the flanks; abdomen 

 finely, loosely punctulate. Leng'th (cf) 7-5 mm.; width 2.5 mm. 

 Colorado. Levette collection puncticeps n. sp. 



Punctures of the head fine and more or less sparse throughout; 

 thoracic prominences less feeble, the intervening surface just visibly 

 concave 10 



10 Head and prothorax of equal width, the latter narrower than usual 

 and longer than wide; color black throughout the body, legs and 

 antennae, the elytra piceous-black, testaceous at base, the pale area 

 descending discally and marginally, the vittae gradually narrowing 

 and becoming obsolete near the middle, the apices also pale; head 

 finely punctate, the punctures well separated but not very sparse; 

 antennae (cf ) four-fifths as long as the body; prothorax much nar- 

 rowed and strongly constricted at apex, the punctures fine, very 

 sparse, less sparse basally; surface alutaceous, the hairs rather short 

 and fine, inconspicuous; elytra highly polished, formed as in la- 

 custrina but with unusually coarse and impressed punctures, fine 

 but not asperate distally and everywhere sparse; abdomen finely, 

 sparsely punctulate. Length (cf ) 7.0 mm.; width 2.4 mm. Colo- 



