NORTH AMERICAN BUPRESTID BEETLES 179 



Female. — Form similar to pulchettus, feebly shining, bluish green, 

 with a more or less violaceous reflection in certain lights; beneath 

 bluish green, becoming more violaceous blue on the abdomen. 



Head with the front not very wide, about equal in width at top 

 and bottom, lateral margins very feebly, arcuately expanded near 

 bottom, mouth inferior, and with a broad, deep depression extending' 

 from vertex to epistoma; surface rather densely, coarsely rugose, 

 the rugae more or less irregularly placed, coarsely punctate be- 

 tween the rugae, and with a spot of long, whitish pubescence 

 behind the epistoma; epistoma very narrow between the antennae 

 and broadly but not deeply, arcuately emarginate in front, the ex- 

 terior angles rectangular; antennae short, compact, extending 

 scarcely beyond anterior margin of pronotum, serrate from the 

 fourth joint, and the outer joints much wider than long; eyes large, 

 and equally rounded above and beneath. 



Pronotum slightly wider than long, narrower at apex than at base, 

 and widest along basal half; sides arcuately expanded from apical 

 angles to middle, then parallel or feebly sinuate to the posterior 

 angles, which are rather acute and feebly projecting; when viewed 

 from the side the marginal carina is sharply defined and straight, 

 the submarginal carina feebly arcuate, and becoming obsolete near 

 the base, the two carinae rather widely separated and nearly parallel 

 to each other anteriorly; anterior margin feebly sinuate, with the 

 median lobe feebly, broadly rounded ; base feebly, broadly, arcuately 

 emgarinate at middle of each elytron, the median lobe broadly 

 rounded, and truncate in front of scutellum ; disk moderately convex, 

 with two shallow median depressions, a very broad, irregular, shallow 

 depression on each side along lateral margin, with four deep, round, 

 pitlike punctures along base, two in front of scutellum, and one on 

 each side near the elytral Jobe, and with a rather long, obtuse, feebly 

 indicated elevation in place of the prehumeral carina; surface 

 coarsely, deeply, densely rugose, the rugae more or less transverse on 

 the disk, becoming irregular toward the sides, and with numerous 

 punctures between the rugae. Scutellum not transversely carinate, 

 but the surface more or less irregularly rugose. 



Elytra scarcely as wide as pronotum at base, and wider at base 

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

 the base, broadly, arcuately constricted in front of middle, broadly, 

 arcuately expanded behind the middle, then arcuately narrowed to 

 the tips, which are separately, narrowly rounded, and finely serrulate ; 

 sides of abdomen very broadly exposed above; disk feebly flattened, 

 without longitudinal costae, the sutural margins scarcely elevated 

 posteriorly, but with broad, deep basal depressions; surface rather 

 finely, densely imbricate-punctate, becoming feebly, transversely 

 rugose in the humeral regions. 



