CERAMBYCHXE 311 



unusually convex, testaceous, with a large blackish cloud on each 

 elytron centring at basal third, and a small discal cloud near the 

 apex behind the fascia; pubescence cinereous, uneven in distribution; 

 antennae dark, mottled and with dark articular apices; prothorax 

 very short, finely, densely punctate, with a small indefinite elevation 

 at each side of the middle anteriorly; elytra closely, rather coarsely 

 and conspicuously punctate, twice as long as wide, parallel, the 

 subacute apices narrowly and very obliquely sinuato-truncate, each 

 with three fine feeble discal raised lines, bearing minute distant 

 blackish clusters of erect hairs; upper marginal line of the flanks 

 acute, obtuse basally; femora all distinctly though moderately cla- 

 vate. Length (9 ) 5-4 mm. ; width 1 .9 mm. Illinois . . dentatus n. sp. 



Sides of the prothorax subparallel, broadly swollen behind the middle, 

 with a small acute denticle projecting from the convexity 4 



4 Elytra rather convex, not more than twice as long as wide, rufo-piceous, 

 the lateral cloud not defined and scarcely evident; cinereous ves- 

 titure sometimes mostly yellowish, not conspicuous near the humeri; 

 antennae as in the preceding; prothorax smaller and narrower, two- 

 thirds wider than long, almost even on the surface and closely punc- 

 tulate but with mottled vestiture; elytra coarsely, deeply, rather 

 closely punctate, the punctures separated by scarcely more than 

 their own diameters, the costuliform lines not elevated but with 

 unusually large blackish penicillations; under surface obscure rufous, 

 the metasternum medially, and abdominal segments apically, black; 

 femora abruptly and moderately clavate. Length (c? 9 ) 4.3-6.3 

 mm.; width 1.4-2.2 mm. District of Columbia and Indiana. 



punctatus Hald. 



Elytra more elongate, more than twice as long as wide, testaceous, with 

 the lateral blackish cloud very large, extending fully to the median 

 line, the cinereous or yellowish vestiture inconspicuous, except in a 

 large area before the black fasciae and toward the humeri; prothorax 

 similar but with the two rounded anterior, and one posterior, black 

 areas, better defined; elytra with the tips similar but not so oblique, 

 the slightly raised lines conspicuously penicillate with black; 

 punctures not so coarse and separated by twice their diameters or 

 more; under surface nearly similar but with denser cinereous ves- 

 titure, the femora moderately clavate. Length (cf 9 ) 4.0-6.8 mm.; 

 width 1.3-2.3 mm. A large series from Indiana, [rusticus Lee.; 

 xanthoxyli Shimer] fascicularis Harris 



5 Femora more or less strongly and abuptly clavate as usual 6 



Femora less clavate, the posterior slender, only very feebly enlarged 

 toward tip in either sex 10 



6 Elytra with the three discal lines rather sharply elevated and distinct, 

 the penicillate points minute and inconspicuous. Body testaceous, 

 the yellowish vestiture of the elytra very minute, not dense and not 

 concealing the sculpture, conspicuously cinereous before the oblique 

 black fasciae, which are largely formed of three elongate spots on the 

 raised lines; lateral black cloud confined to the flanks behind the 

 humeri, not attaining the latter, the upper line of the flanks rather 

 acute except basally, the punctures moderately coarse, well separated ; 



