CERAMBYCID/E 329 



surface and legs black, the tibiae and femora pale basally; head, 

 prothorax and elytra increasing equally and moderately in width, 

 the antennae dull rufous, variegated with black as usual, the scape 

 black, twice as long as the body (cf ) or a little less (9 ); prothorax 

 short and transverse, two-thirds (cf) to once (9) wider than long, 

 almost parallel, swollen feebly at the sides medially, the spicule 

 acute, near basal fifth; surface dull, finely, not densely punctate, 

 the four spots well developed, not tumid; elytra parallel, rounding 

 at the sides behind, the angles dentiform; lateral carina sharp but 

 not elevated; surface sparsely, moderately punctate, the black spots 

 irregularly distributed, large, equal and circular, the ashy discal 

 lines wholly obsolete; flanks rufescent, strongly and closely punctate; 

 femora strongly clavate, the posterior of the female more slender 

 but distinctly clavate; fifth ventral (cf ) slightly longer than the 

 fourth, rounded, the apex rather narrowly and feebly truncate. 

 Length (cf 9 ) 4.2-5.5 mm.; width 1.4-1.9 mm. Indiana and New 

 York (Lake Champlain). The New York example has much darker 

 plumbeous vestiture aspersa Say 



Form more rhomboidal, not very stout, feebly convex, infuscate, the 

 elytra not paler except on the flanks; under surface and legs dull 

 rufous, the femora and tibiae black distally, the tarsi blackish; 

 vestiture of small decumbent hairs even, fusco-cinereous, not very 

 dense; head indented, opaque, rather small, the prothorax broader 

 but with the difference less notable than that between the prothorax 

 and elytra; antennae (cf ) as in aspersa but longer, two and one-half 

 times as long as the body; prothorax two-thirds wider than long, 

 prominently rounded at the sides medially, the sides thence oblique 

 to apex and base, the sides of the apex rounded, not tumid; spicule 

 acute, just behind basal fourth; surface concave along the base, 

 somewhat shining, finely, not densely punctate, the four dark spots 

 not tumid; elytra much wider than the prothorax, with widely ex- 

 posed and rounded humeri, rather strongly cuneiform, with straight 

 sides, feebly rounding apically to the acute and subspiniform angles; 

 surface strongly, moderately closely punctate, the punctures tending 

 to very irregular lineal arrangement, the black spots very small, 

 sparse, uniform; discal lines very feeble; lateral carina fine and very 

 acute, somewhat elevated; flanks coarsely, very deeply and densely 

 punctate basally, rather finely and less closely apically; femora 

 strongly clavate; fifth ventral (cf ) longer than the fourth, rather 

 narrowly rounded, the apex narrowly subtruncate, the fourth segment 

 broadly and very feebly sinuate. Length (cf) 5-3 mm.; width 1.7 

 mm. District of Columbia vigilans n. sp. 



14 Body very stout, feebly convex, flattened medially, dull black, the 

 very minute and rather loose vestiture blackish-brown and uniform, 

 more cinereous but extremely minute beneath and on the legs; 

 under surface black, the legs black, the tibiae feebly picescent 

 basally, the femora bright red in basal half or more; head well de- 

 veloped, dull black, the antennae ( 9 ) dull black throughout and 

 slightly less than twice as long as the body; prothorax barely more 

 than one-half wider than long, slightly wider than the head and very 



