CERAMBYCID.E 379 



of the under surface more whitish and less bluish; fifth ventral (9 ) 

 broadly angulate at tip and not transversely truncate as it is in 

 canescens, similarly two-thirds longer than the fourth, the erect 

 hairs less blackish, or (cf) barely at all longer than the fourth, with 

 the truncate apex half as wide as the base and much broader than in 

 canescens. Length (cf 9 ) 10.0-12.5 mm.; width 3.8-4.7 mm. 

 Utah (Marys vale), Wickham uteanus n. sp. 



13 Body rather stout, convex, shining, red, the entire under surface, 

 legs and antennae black; cinereous vestiture above very minute, 

 not dense, the erect hairs moderate and black; antennae with the 

 first three joints deep black and coarsely, sparsely nigro-pubescent, 

 the remainder brownish-black and clothed very densely with short 

 fuscous pubescence, not at all cinereous basally; prothorax distinctly 

 narrower than the elytra, the lateral prominences strong, the umbo 

 broad, subrhomboidal, rather abruptly formed, the four spots 

 unusually large; elytra oblong, the humeri not tumid; punctures 

 rather strong but sparse, fine apically. Length (cf 9 ) 9.0-14.5 mm.; 

 width 3.2-5.0 mm. New York (Lake Champlain), Pennsylvania to 

 Iowa (Keokuk). [Lamia tornator Fabr.] tetrophthalmus Forst. 



Body less stout, more parallel, brighter red, rather less shining, the under 

 surface, legs and antennae nearly as in the preceding; prothorax more 

 transverse and very nearly as wide as the elytra, the central umbo 

 similar but evenly rounded at the sides and less strongly punctured, 

 the spots similar; elytra similarly maculate but with the punctures 

 coarser and more close-set; humeri differing remarkably, being 

 abruptly prominent, rounded and knob-like; under surface grayer. 

 Length (cf) 12.0 mm.; width 4.2 mm. Dakota., .humeralis n. sp. 



14 Four black spots of the pronotum forming a quadrangle which is 

 distinctly wider than long, sometimes strongly transverse and with 

 the two spots on each side connected longitudinally 15 



Four black spots forming a square or very nearly, except in obsoletus and 

 cocdneus, where they form a more transverse rectangle, though with 

 no tendency to unite longitudinally 18 



15 Smaller species, the vestiture of the upper surface only moderately 

 dense and not very conspicuous 16 



Large species, the vestiture above extremely dense, producing a velvety 

 appearance and having ( 9 ) a denuded spot near the apex of each 

 elytron, not visible in the preceding 17 



16 Body stout, convex, the elytra unusually short, bright red above, 

 the under surface and legs black and densely clothed with yellowish- 

 gray pubescence, the femora all red but black at their extreme 

 apices; erect hairs black, long on the prothorax, moderate on the 

 elytra; antennas ( 9 ) short, three-fourths as long as the body, the first 

 three joints bristling as usual with numerous erect hairs and having 

 some ashy pubescence, the scape partially tinged with red; prothorax 

 transverse, moderately prominent at the sides, the umbo strong, 

 elongate, abruptly formed, with broadly arcuate sides and rather 

 coarse sparse punctures, not impressed ; spots very close longitudinally 

 and joined by a black vitta along the sides of the umbo; elytra but 

 little more than one-half longer than wide, all the spots well 



