NORTH AMERICAN BUPRESTID BEETLES 131 



Elytra slightly wider than pronotum at base, distinctly wider at 

 base than at apical third; sides nearly parallel for a short distance 

 behind base, strongly, broadly, arcuately constricted in front of 

 middle, feebly, arcuately expanded at apical third, then obliquely 

 attenuate to the tips, which are separately, narrowly rounded, and 

 strongly serrulate; sides of abdomen broadly exposed above; disk 

 rather strongly flattened, the juncture of the discal flattened por- 

 tion with the convex sides of the elytra has the appearance of an 

 obtuse costa curving inward from the humeri and vanishing behind 

 the middle, the sutural margins feebly elevated posteriorly, and with 

 deep, very broad, basal depressions; surface densely, coarsely, 

 imbricate-punctate, without distinct pubescence, except for a narrow, 

 obsolete vitta of short, sparsely placed, yellowish hairs along the 

 sutural margin at apical fourth. 



Abdomen beneath finely, sparsely punctate along the middle, more 

 densely toward the sides, becoming densely, transversely rugose on 

 the basal segment, sparsely clothed with short, recumbent, yellowish 

 hairs, and with a slightly more densely pubescent spot at the sides 

 of the segments ; first segment distinctly flattened at the middle, the 

 second with a rather wide, deep, smooth groove, which has the sides 

 nearly parallel, and extending from anterior margin of segment to 

 posterior third ; last segment broadly truncate at apex ; vertical por- 

 tions of the segments densely clothed with recumbent yellowish 

 pubescence; pygidium strongly carinate, the carina projecting and 

 truncate at apex. Presternum finely, densely punctate, somewhat 

 rugose, and sparsely clothed with short, whitish hairs; prosternal 

 lobe broad, strongly declivous, and broadly rounded in front; pros- 

 ternal process broad, the sides parallel to behind the coxal cavities, 

 then strongly attenuate to the apex, which is acute. Tibiae slender, 

 nearly straight, and anterior and middle pairs armed with a short 

 tooth on inner margin at apex. Posterior tarsi distinctly shorter 

 than tibiae, and the first joint about equal in length to the following 

 three joints united. Tarsal claws dissimilar, anterior ones cleft near 

 the tip, and the teeth nearly equal in length; middle and posterior 

 claws cleft near middle, the inner tooth shorter than the outer one, 

 slightjy turned inward, but the tips distant. (Claws on anterior 

 tarsi missing on type). Genitalia similar to acutipennis Manner- 

 heim. 



Length, 9.6 mm. ; width, 2.5 mm. 



Female. — Differs from the male in being more robust, not so at- 

 tenuate posteriorly; front of head slightly broader and more cupre- 

 ous; antennae slightly shorter and the outer joints as wide as long; 

 first and second abdominal segments convex, and without a groove at 

 middle; last abdominal segment more broadly rounded at apex; 



