CERAMBYCID^ 265 



Antennae more slender, extending to the posterior parts of the elytra in 

 the male, much shorter in the female; species eastern in range, not 

 crossing the Rocky Mountains to the westward 2 



Antennae shorter and much stouter, extending barely beyond the middle 

 of the elytra even in the male; species of the far west, not crossing 

 the Rocky Mountains to the eastward; second and third elytral 

 fasciae broadly united at the suture in both sexes, the first tending to 

 unite with the second at the suture 3 



2 Head evidently narrower than the prothorax in both sexes, though 

 less distinctly so in the male, the elytra in the latter sex more 

 elongate, only very gradually cuneiform, more than twice as long 

 as wide, the second and third fasciae narrow, seldom exhibiting any 

 tendency to unite by sutural extension; pronotal punctures fine, 

 irregular in distribution, generally close-set. Length (cf) 10.5- 

 II. 8 mm.; (9) 9.5-12.7 mm.; width (cf) 3.6-3.9 mm., (9) 3.4- 

 4.7 mm. Rhode Island, New Jersey and Pennsylvania. 



nitens Forst. 



Head in the male about as wide as the prothorax, the elytra in that sex 

 very much shorter, relatively broader at base and rapidly cuneiform, 

 not quite twice as long as wide, the external apical angle not so 

 posteriorly prolonged as in nitens and very minutely dentiform; 

 second and third golden fasciae broadly uniting longitudinally at 

 the suture; pronotal punctures not quite so small and less close-set. 

 Length (cf ) n.8 mm.; width 4.1 mm. Colorado bellina n. sp. 



3 Prothorax large, wider than long, strongly angulated and prominent 

 at the sides just before the middle; body more obese 4 



Prothorax about as long as wide, only slightly and arcuately subinflated 

 at the sides before the middle 5 



4 Elytra in the female shorter, much less than twice as long as wide, 

 more strongly cuneiform than in nitens, minutely, not densely punctu- 

 late; pronotal punctures much stronger, moderately close-set; basal 

 joint of the antennae slender, arcuate and narrow basally, somewhat 

 inflated apically; last dorsal segment of the abdomen triangular, 

 flat, narrowly rounded at tip. Length (9 ) 13.0 mm.; width 5.3 mm.. 

 California (near Sacramento the type locality) laeta Lee. 



Elytra in the female longer, more gradually though strongly cuneiform, 

 very nearly twice as long as wide, the punctures twice as large and 

 relatively denser; pronotal punctures not quite so strong as in Iccta 

 and denser; basal joint of the antennae thicker, evenly obconical; 

 last dorsal segment of the abdomen slightly convex, differing greatly 

 from lata in having the sides feebly converging to the much more 

 broadly rounded apex. Length (9) 15.0 mm.; width 5.6 mm. 

 New Mexico ostenta n. sp. 



5 Head (d 71 ) as wide as the prothorax, very densely punctate and opaque, 

 the antennae moderately thick, the tenth joint more than twice as 

 long as wide; prothorax with almost even, rather strong punctures, 

 separated by from once to nearly twice their diameters, the vesti- 

 ture coarser and more evenly distributed than in Iceta; elytra strongly 

 cuneiform, four-fifths longer than wide, very finely and closely 

 punctate; lateral beading and contiguous flanks testaceous through- 



