CERAMBYCID^E 381 



similar but stouter and a little shorter, the scape red, tipped with 

 black; prothorax nearly as in vchitinus but much less transverse, 

 with less protuberant sides, the umbo more conspicuous, more 

 strongly and very abruptly elevated, the sides almost straight, its 

 surface more impressed on the median line posteriorly; elytra shorter, 

 the punctures slightly coarser and closer and very much more distinct, 

 the spots similar, except that the post-humeral is always much 

 smaller; abdomen (9) much less prolonged behind the elytra; 

 coriaceous hind margins of the segments (cf) very much broader 

 than in the preceding, short in the female. Length (cJ* 9 ) 15.5- 

 16.5 mm.; width 5.8-6.2 mm. Three examples from the Levette 

 collection, without labels but probably taken in Colorado. 



robustus n. sp. 



Body much smaller, more slender, rather pale brick-red above, the cine- 

 reous vestiture not quite so dense, the erect hairs cinereous, very short, 

 scarcely discoverable, longer but palish on the prothorax, the black 

 under surface densely clothed with whitish-cinereous vestiture; 

 femora and tibiae pale red, the latter sometimes partially black; 

 antennae as in the preceding but more slender, the scape bright red, 

 tipped with black to black, feebly rufescent medially; prothorax 

 nearly as in the preceding, the very abrupt umbo parallel, very feebly 

 arcuate at the sides and impressed only with a very fine groove at the 

 extreme base; elytra subparallel, only slightly expanded at the 

 humeri, strongly but not very closely punctate, the four spots 

 distinct, the post-humeral subquadrate but not larger than the 

 anterior discal, the posterior as usual blacker and more velvety, 

 transversely oval. Length (of 1 ) 12.7-14.0 mm.; width 4.6-5.0 mm. 

 Kansas, F. H. Snow brevisetosus n. sp. 



20 Elytra finely and sparsely punctate; post-humeral spot generally 

 obsolete. Pacific coast faunal region 21 



Elytra strongly and more closely punctured. Rocky Mountain region 

 and to the eastward 22 



21 Body larger in size, pale red, the elytra pale brownish-yellow, moder- 

 ately shining, the cinereous vestiture not conspicuous, the erect hairs 

 short, cinereous, the black under surface clothed densely with oliva- 

 ceous vestiture; femora red, the knees black; tibiae blackish to evi- 

 dently rufescent; antennae rather stout, the fourth joint largely 

 clothed with cinereous as well as the first three, the scape red, tipped 

 with black; prothorax transverse, the lateral prominences strong, 

 more angular than in the Rocky Mountain species, the umbo 

 strongly, very abruptly elevated, its sides parallel, distinctly and 

 evenly arcuate, the median line always impressed basally and some- 

 times throughout the length, the punctures strong but not approach- 

 ing the sides of the umbo; elytra oblong, with unusually fine and 

 very sparse punctures throughout, the anterior juxta-sutural spot 

 well developed, oval, slightly transverse, the posterior large, slightly 

 transverse, oval, the post-humeral very small in the type and wholly 

 wanting in the other two examples; tarsi rather broad, the second 

 joint of the posterior not quite as long as wide and only feebly, 



