130 BULLETIN 14 5, UNITED STATES NATIONAL MUSEUM 



poplar (Populus sp.) and hazelnut (Corylus amerkana Walter). 

 Chamberlin (1926) records it as breeding in Quercus ganibelii Nut- 

 tall, but this record refers to quercicola. 



Horn (1891) writes that the anterior and middle tibiae of the fe- 

 males are unarmed, but this statement is incorrect as both these pairs 

 of tibiae are armed with a small tooth at the apex. 



40. AGRILUS AURICOMUS Frost 



Agrttus auricomus Frost, Canad. Ent., vol. 44, 1912, pp. 250-252 ; Canad 

 Ent, vol. 52, 1920, pp. 28, 250-251.— Frost and Weiss, Canad. Ent., vol. 

 52, 1920, p. 210.— Britton, Conn. State Geol. and Nat. Hist. Survey, 

 Bull. 31, 1020, p. 244.— Knull, Ohio State Univ. Studies, vol. 2, no. 2, 

 p. 46.— Chamberlin, Cat. Buprestidae, 1926, p. 53. 



Male. — Form robust, moderately shining, and rather strongly flat- 

 tened above; head aureo-aeneous ; pronotum aeneous, with a more 

 or less distinct cupreous tinge; elytra black, with a vague olivaceous 

 reflection; beneath aeneous, with a feeble cupreous tinge, and more 

 shining than above. 



Head with the front rather wide, nearly flat, slightly narrower at 

 bottom than at top, lateral margins arcuately expanded at the middle, 

 and with a narrow, longitudinal groove extending from occiput 

 nearly to the epistoma, and more deeply impressed on the occiput 

 and vertex ; surface densely, coarsely punctate, becoming more or less 

 rugose on occiput, and sparsely clothed with long, semierect, yel- 

 lowish hairs; epistoma rather narrow between the antennae, and 

 broadly but not deeply, arcuately emarginate in front ; antennae ex- 

 tending to middle of pronotum, serrate from the fourth joint, and 

 the outer joints slightly longer than wide; eyes large, strongly 

 elongate, and about equally rounded above and beneath. 



Pronotum one-half wider than long, base and apex about equal in 

 width, and widest at middle; sides regularly, arcuately rounded; 

 when viewed from the side the marginal carina is strongly sinuate, 

 the submarginal one less strongly so, the two carinae narrowly 

 separated anteriorly, and connected to each other at the base; anterior 

 margin strongly sinuate, with a broadly rounded median lobe; base 

 feebly emarginate at middle of each elytron, the median lobe broadly 

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

 with a broad, shallow median depression, which is vaguely divided 

 at middle, a small depression on each side along base near posterior 

 angles, a broad, deep depression on each side along lateral margins, 

 and without distinct prehumeral carinae; surface rather deeply, 

 closely, transversely rugose, finely punctate between the rugae, and 

 sparsely clothed with recumbent, yellowish hairs in the lateral de- 

 pressions. Scutellum transversely carinate, the carina strongly inter- 

 rupted at the middle, and the surface finely reticulate. 



