CERAMBYCID.E 337 



posteriorly diverging lines of cinereous, beginning on the anterior 

 tumidities, the punctures not coarser but finer near the base; elytra 

 narrow but wider than the prothorax, feebly cuneiform, less than 

 two and one-half times as long as wide, evenly rounding at apex 

 to the bluntly rounded sutural angles; surface with rather strong 

 and close-set punctures, the two oblique fasciae tolerably distinct; 

 supplementary dorsal segment (cf ) narrowly and distinctly bilobed, 

 the rounded separating sinus much larger than in the preceding; 

 femora clavate, the abdomen with close-set denuded black spots. 

 Length (cf ) 9.0 mm. ; width 2.6 mm. New Mexico. . acomanus n. sp. 

 6 Elytra each with two oblique and more or less disintegrated fasciae 

 nearly as in acomanus, and also numerous other small black spots 



arranged along the slightly elevated discal lines 7 



Elytra with solid velvety-black and irregular sharply angulate areas 

 arranged in the usual two irregular oblique fasciae, the spots of the 



raised lines subconfluent; body more broadly oblong 8 



7 Form moderately broadly oblong, with subparallel elytra, each 

 broadly rounded at apex; head larger than in the preceding, other- 

 wise similar, the antennae similar but much longer, the process of the 

 last joint (cf ) very much longer, eight times as long as wide, with 

 the terminal brush of hairs distinct; joints ashy in basal half, the 

 ashy part extending much more apically on the longer last three 

 joints; prothorax one-half wider than long, the spines short, sharp, 

 slightly recurved at basal third; surface strongly but very sparsely 

 punctate, with four anterior cinereous spots, the two inner on the 

 inner sides of the tumors, the surface thence obliquely cinereous to 

 the base; elytra coarsely, extremely densely punctate between the 

 lines; supplementary dorsal (cf ) broadly bilobed at tip, the lobes 

 widely separated by a shallow angular sinus; last dorsal (9) pro- 

 duced and subparallel apically to the very obtuse and densely 

 fringed tip. Length (cf 9 ) 10.7-12.0 mm.; width 3.1-3.8 mm. 



New Mexico and Colorado obliquus Lee. 



A Similar to the preceding but smaller and relatively narrower, 

 almost parallel, the anterior fascia broader and more diffused, the 

 posterior narrow and similar, the punctures and ornamentation 

 nearly similar; sides of the prothorax with a very small and almost 

 obsolete spinule, projecting from the swelling at basal third; 

 supplementary dorsal (cf ) narrower, the lobes narrower and much 

 less obtuse, separated by a very much deeper and angulate emar- 

 gination. Length (cf ) 10.5 mm.; width 3.0 mm. Mexico (Chi- 

 huahua), C. H. T. Townsend chihuahuas n. subsp. 



B Nearly similar to obliquus in form, color and ornamentation, but 

 with the elytral punctures more widely separated and not so 

 coarse, the elytral apices narrower, subtruncate; supplementary 

 dorsal (cf ) differing materially in having the lobes smaller, more 

 rounded and separated by a rounded sinus of varying depth, 

 the sinus larger than the lobes; antennae more slender, with the 

 terminal process nearly similar, long. Length (cf 9 ) 10.5-11.0 

 mm.; width 3.1-3.4 mm. New Mexico (Fort Wingate). 



sedulus n. subsp. 

 T. L. Casey, Mem. Col. IV, Oct. 1913. 



