NORTH AMERICAN BUPRESTID BEETLES 189 



Head with the front rather wide, slightly convex, distinctly wider 

 at top than at bottom, the lateral margins obliquely narrowed from 

 top to bottom, and with a shallow. median depression extending from 

 the vertex to epistoma ; surface sparsely, coarsely punctate, and with- 

 out distinct pubescence ; epistoma very narrow between the antennae, 

 and nearly transversely truncate in front; antennae extending to 

 middle of pronotum, serrate from the fourth joint, and the outer 

 joints about as wide as long; eyes rather small, broadly oval, and 

 slightly more acutely rounded beneath than above. 



Pronotum vaguely wider than long, about equal in width at base 

 and apex, and widest along middle; sides slightly rounded at apical 

 angles, parallel to behind middle, then obliquely narrowed to the pos- 

 terior angles ; when viewed from the side the marginal and submargi- 

 nal carinae are nearly straight, rather widely separated anteriorly, 

 and connected to each other at the base ; anterior margin feebly sinu- 

 ate, with the median lobe feebly, broadly rounded; base feebly, 

 arcuately emarginate at middle of each elytron, the median lobe 

 broadly rounded, and subtruncate in front of scutellum ; disk strongly 

 convex, feebly, broadly, transversely concave along base, and without 

 median or lateral depressions or prehumeral carinae; surface obso- 

 letely granulose, finely rugose, the rugae widely separated, more or 

 less transverse on disk but becoming oblique toward the sides, 

 sparsely, finely punctate between the rugae, and clothed with a few 

 inconspicuous hairs toward the sides, being a continuation of the 

 elytral vittae. Scutellum not distinctly carinate, but the surface 

 finely, densely reticulate. 



Elytra slightly wider than pronotum at base, and slightly narrower 

 at base than behind middle ; sides nearly parallel for a short distance 

 behind base, broadly, feebly constricted in front of middle, rather 

 strongly, arcuately expanded behind the middle, then obliquely nar- 

 rowed to the tips, which are separately, rather broadly rounded, and 

 distinctly serrulate ; sides of abdomen not exposed above ; disk vaguely 

 convex, sutural margins scarcely elevated posteriorly, and with broad, 

 very shallow basal depressions; surface coarsely, roughly imbricate- 

 punctate, and each etytron ornamented with a narrow subsutural, 

 pubescent vitta extending from the basal depression to apex, and 

 composed of sparsely placed, short, recumbent, whitish hairs. 



Abdomen beneath finely, densely granulose, rather sparsely, finely 

 punctate, the punctures more or less transversely connected by sinu- 

 ate lines, becoming rugose at the sides of first two segments, and 

 sparsely clothed with short, inconspicuous hairs, which are more 

 distinct at sides of segments; first segment feebly convex and not 

 pubescent at middle ; last segment broadly rounded at apex ; posterior 

 margin of the second segment produced into a broadly arcuate lobe 



