CERAMBYCID^E 235 



12 Prothorax never longer, and generally distinctly shorter than wide; 

 elytra usually uniform in color, deep black as a rule 13 



Prothorax always somewhat longer than wide; elytra vittate 20 



13 Basal angles of the prothorax small and, though acute, never pro- 

 longed beyond the longitudinal line limiting the median arcuation 

 of the sides 14 



Basal angles very acute and laterally prolonged beyond the line of the 

 median arcuation, the prothorax more narrowed from base to apex, 

 or more campanulate 15 



14 Color black throughout the body, legs and antennae, except the 

 humeral angles of the elytra, which are red; pubescence ashy, rather 

 long and moderately close, partially erect, shorter, coarser and 

 sparser on the elytra, though conspicuous; head and prothorax very 

 densely punctate and dull, the former subquadrate, the tempora 

 but little less prominent than the eyes, parallel for a short distance, 

 then strongly rounding; antennae slender, nearly as long as the body 

 in the male; prothorax barely wider than long, not conspicuously 

 narrowed at apex, rounded at the sides medially, the constrictions 

 evident but not deep; smooth median line virtually obliterated, 

 finely striiform submedially; elytra two-fifths wider than the pro- 

 thorax, rapidly tapering, rather more than twice as long as wide, 

 rounding at apex, with obtuse sutural angles, the punctures rather 

 coarse, unusually close, becoming dense suturad, the sutural bead 

 not more densely pubescent; abdomen finely, rather closely punctate 

 and loosely clothed with long hairs, the fifth segment (c?) narrowly 

 sinuato-truncate at apex and with the surface impressed medially 

 toward tip. Length (c?) 8.5 mm.; width 2.8 mm. Oregon. 

 [Acmceops militaris Lee.] militaris Lee. 



Color deep black throughout, with the anterior tibiae and tarsi alone paler 

 and obscure testaceous, the entire elytra, legs and antennae through- 

 out occasionally pale ochreo-testaceous, at least in the male, the 

 abdomen always black, sometimes pale at the extreme tip; head and 

 prothorax densely punctate but less so and less dull than in the pre- 

 ceding species, the elytral punctures much coarser and more widely 

 separated, becoming more rapidly and decidedly smaller from base 

 to apex; head in both sexes with more prominent eyes and more ob- 

 liquely rounding, much less prominent tempora than in militaris; pro- 

 thorax more decidedly transverse and with relatively more narrowed 

 apex and deeper constrictions; elytra nearly similar in form, rapidly 

 tapering throughout in the male, or just visibly in the female; elytral 

 suture not more densely pubescent; pubescence long, abundant, 

 erect and bristling on the head and prothorax, sparser, less elongate 

 and more reclining on the elytra, becoming bristling and erect only 

 toward base. Length (c? 9 ) 9.0-10.0 mm.; width 2.8-3.1 mm. 

 Washington State to Montana (Helena W. M. Mann) and 

 Wyoming (Yellowstone Park). [Acmceops stibpilosa Lee.]. 



subpilosa Lee. 



15 Sutural bead of the elytra conspicuously and densely albido- 

 pubescent, the hairs elsewhere very small, fine and inconspicuous, 

 longer at apex and the side margins. Body only moderately slender, 



