200 BULLETIN 14 5, UNITED STATES NATIONAL MUSEUM 



Male. — Form slender, elongate, feebly flattened above, and mod- 

 erately shining; head bronzy green to golden green, becoming 

 brownish cupreous on the occiput; pronotum and elytra varying 

 from bronzy black to olivaceous brown, sometimes with a feebly 

 purplish tinge, and each elytron ornamented with three or four 

 whitish or yellowish pubescent spots; beneath bronzy or cupreous, 

 more shining than above, and the legs more or less greenish. 



Head with the front rather narrow, nearly flat, about equal in 

 width at top and bottom, the lateral margins broadly, arcuately con- 

 stricted near the bottom, transversely depressed behind the epistoma, 

 and with a feeble, narrow, longitudinal groove extending from 

 occiput to middle of front ; surface finely, densely granulose, densely, 

 coarsely punctate, more or less rugose on front, the rugae becoming- 

 longitudinal on the occiput, and sparsely clothed with long, recum- 

 bent, whitish hairs, which are denser behind the epistoma; epistoma 

 strongly transverse between the antennae, and rather broadly, deeply 

 emarginate in front; antennae extending nearly to posterior angles 

 of pronotum, serrate from the fourth joint, and the outer joints dis- 

 tinctly longer than wide; eyes large, rather broadly oblong, and 

 about equally rounded above and beneath. 



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

 than apex, and widest along apical half or near apex; sides feebly 

 arcuate or obliquely narrowed from apex to behind middle, then more 

 strongly narrowed to the posterior angles, which are sharply rectan- 

 gular; when viewed from the side the marginal and submarginal 

 carinae are strongly sinuate, narrowly separated anteriorly, and 

 connected to each other behind the middle ; anterior margin strongly 

 sinuate, with the median lobe broadly rounded; base feebly emar- 

 ginate at the middle of each elytron, the median lobe broadly 

 rounded, and feebly emarginate in front of scutellum; disk mod- 

 erately convex, with two more or less distinct median depressions 

 (sometimes one or both nearly obsolete), a broad, moderately deep, 

 oblique depression on each side along lateral margin, and with sharply 

 elevated, straight prehumeral carinae, extending from posterior angles 

 to near middle; surface coarsely, deeply, transversely rugose at 

 middle, finely densely punctate between the rugae, and rather densely 

 clothed with recumbent whitish or yellowish hairs at the sides ante- 

 riorly. Scutellum strongly, transversely carinate, and the surface 

 densely finely reticulate. 



Elytra wider than pronotum at base, and slightly wider at base 

 than behind the middle; sides nearly parallel and sinuate for a 

 short distance behind the base, broadly, arcuately constricted in 

 front of middle, broadly, arcuately expanded behind the middle, then 

 obliquely narrowed to the tips, which are separately, rather broadly 

 rounded, and strongly serrulate; sides of abdomen narrowly ex- 



