NORTH AMERICAN BUPRESTID BEETLES 273 



Head with the front rather wide, moderately convex and shining, 

 about equal in width at top and bottom, the lateral margins nearly 

 parallel, and with a feeble longitudinal groove extending from occi- 

 put to middle of front; surface finely, sparsely punctate, strongly 

 rugose, and sparsely clothed with short, recumbent, silvery white 

 hairs ; epistoma transverse between the antennae, and broadly but not 

 deeply, arcuately emarginate in front; antennae extending nearly to 

 middle of pronotum, serrate from the fifth joint, and the outer joints 

 slightly wider than long; eyes large, broadly oblong, and slightly 

 more acutely rounded beneath than above. 



Pronotum one-fourth wider than long, distinctly narrower at base 

 than apex, and widest near middle; sides arcuately rounded from 

 apical angles to behind middle, then strongly, obliquely narrowed to 

 the posterior angles, which are rectangular; when viewed from the 

 side the marginal and submarginal carinae are nearly straight, 

 scarcely deflexed in front, and narrowly separated from each other 

 for their entire length ; anterior margin rather strongly sinuate, and 

 with a broadly rounded median lobe; base rather strongly emargi- 

 nate at middle of each elytron, with the median lobe broadly rounded, 

 and feebly emarginate in front of scutellum; disk moderately convex, 

 without a distinct median depression, but with a broad, vague depres- 

 sion on each side along lateral margin, and with short, vague, 

 obtusely rounded, prehumeral carinae ; surface very obliquely rugose, 

 the rugae widely separated, finely, sparsely punctate between the 

 rugae, sparsely clothed with short, recumbent hairs toward the sides, 

 and with a distinct opaque, granulose area at middle along anterior 

 margin. Scutellum strongly, transversely carinate, and the surface 

 densely, finely reticulate. 



Elytra slightly wider than pronotum at base, and only vaguely 

 wider at base than behind middle ; sides nearly parallel from base to 

 apical third (feebly, arcuately constricted near middle), then ob- 

 liquely attenuate to the tips, which are separately, rather narrowly 

 rounded and strongly serrulate; sides of abdomen broadly exposed 

 above; disk slightly flattened, feebly, longitudinally depressed along 

 sutural margins, which are slightly elevated posteriorly, and with 

 broad, moderately deep, basal depressions; surface coarsely imbri- 

 cate-punctate, sparsely clothed with short, inconspicuous hairs, and 

 each elytron ornamented with three elongate spots of rather densely 

 placed long, recumbent, yellowish white hairs, one in basal depres- 

 sion, one in front of middle, and the other at apical third. 



Abdomen beneath finely, densely granulose, finely, sparsely punc- 

 tate, the punctures connected transversely by fine sinuate lines, which 

 are coarser on the basal segments, and sparsely, uniformly clothed 

 with short, recumbent, white hairs; first segment convex at middle; 



