NORTH AMERICAN BUPRESTID BEETLES 253 



some examples the pronotum is widest at the middle, the sides are 

 arcuately rounded, and the marginal and submarginal carinae are 

 separated for their entire length. The median depression on the 

 pronotum is more or less variable, and the scutellum is usually 

 strongly, transversely carinate, but in a few examples the carina is 

 only feebly indicated as in the type. Length 5.5 to 7.5 millimeters. 



Host. — Unknown. 



This species is very closely allied to jacobinus Horn, which is out 

 of place in Horn's table, it being assigned to the section having the 

 antennae serrate from the fourth joint, whereas the serration begins 

 at the fifth joint. This error was discovered by Fall (1907), and 

 thinking that it was the same species as his Ulectus, placed his species 

 as a synonym of jacobinus. There will be some difficulty in separat- 

 ing these two species, but illectus is a valid species and has the pro- 

 notum more or less depressed at the middle and the surface is usually 

 transversely rugose, the scutellum is feebly, transversely carinate, 

 the pubescent vittae on the elytra are rather distinct, and the pos- 

 terior margin of the hind coxae is strongly sinuate, whereas in 

 jacobinus the pronotum is convex, without any median depressions, 

 and the surface is usually densely scabrous, the scutellum is not 

 transversely carinate, the pubescent vittae on the elytra are obsolete, 

 and the posterior margin of the hind coxae is regularly, arcuately 

 emarginate. The males of the two species can be readily separated 

 by the genitalia. 



86. AGRILUS SIERRAE Van Dyke 



Agrilus sierrae Van Dyke, Bull. Brooklyn Ent. Soc, vol. 18, 1923, pp. 40- 

 41. — Chamberlin, Cat. Buprestidae, 1926, p. 81. 



Male. — Form similar to abditus Horn, but slightly larger and 

 feebly shining; head bronzy green in front, but becoming more 

 brownish on the occiput; pronotum and elytra uniformly bronzy 

 brown; beneath slightly more bronzy green and more shining than 

 above. 



Head with the front rather wide, slightly convex, and about equal 

 in width at top and bottom, the lateral margins nearly parallel to 

 each other, and with a broad, moderately deep depression extending 

 from the occiput to epistoma, the depression more broadly, deeply 

 impressed on the vertex; surface densely granulose, more or less 

 irregularly rugose, and rather densely clothed with moderately long, 

 semierect whitish pubescence; epistoma not transverse between the 

 antennae, and broadly, deeply, arcuately emarginate in front; an- 

 tennae extending to middle of pronotum, serrate from the fifth joint, 

 and the outer joints as wide as long; eyes large, broadly oblong, and 

 slightly more broadly rounded above than beneath. 



