96 BULLETIN 14 5, UNITED STATES NATIONAL MUSEUM 



Host. — The larvae of this species live in the outer bark of living 

 butternut (Juglans Sn-erea Linnaeus), and adults have been reared 

 from this host by Knull, Champlain, and Fisher. 



This species is closely allied to frosti Knull, but in the males the 

 first and second abdominal segments are not longitudinally flattened 

 as in that species, and can be easily separated from it by the genitalia, 

 which is strongly, arcuately expanded at the middle, with the sides 

 nearly parallel to each other toward the apex. The females can not 

 be satisfactorily separated from those of the allied species. 



28. AGRILUS PUNCTICEPS LeConte 



Agrilus puncticeps LeConte, Trans. Amer. Philos. Soc, vol. 11, new ser., 

 1859, p. 249.— Pettit, Canad. Ent, vol. 2, 1870, p. 102.— Zesch and 

 Reinecke, North Amer. Ent. (Buffalo, N. Y.), vol. 1, 1880, p. vii. — 

 Horn, Trans. Amer. Ent. Soc, vol. 18, 1891, p. 336. — Frost, Canad. 

 Ent., vol. 44, 1912, p. 249. — Chamberlin, Cat. Buprestidae, 1926, p. 60. 



Feirmle. — Form that of otiosus Say, and moderately shining; an- 

 tennae blackish green; head bronzy green, becoming cupreous on 

 the occiput; pronotum brownish cupreous on the median part, and 

 becoming bronzy green toward the sides; elytra brownish black; 

 beneath black, with a more or less aeneous or greenish tinge, and 

 more shining than above. 



Head with the front wide, slightly convex, about equal in width 

 at top and bottom, the lateral margins nearly parallel to each other 

 and without a distinct median groove; surface rather coarsely, 

 densely granulose, very coarsely, deeply punctate, becoming longi- 

 tudinally rugose on the occiput, and sparsely clothed behind the 

 epistoma with long, semierect, white hairs; epistoma transverse 

 between the antennae, and feebly, broadly, arcuately emarginate in 

 front; antennae extending slightly beyond middle of pronotum, 

 serrate from the fourth joint, and the outer joints as wide as long; 

 eyes large, strongly elongate, and about equally rounded above and 

 beneath. 



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

 apex, and widest along apical half, sides nearly parallel from apical 

 angles to middle, then feebly narrowed to near the posterior angles, 

 where they are vaguely sinuate ; when viewed from the side the mar- 

 ginal carina is feebly sinuate, the submarginal carina straight, the 

 two carinae rather widely separated anteriorly, and connected to 

 each other near the posterior angles; anterior margin strongly sinu- 

 ate, with the median lobe strongly, broadly rounded; base strongly, 

 transversely bisinuate, the median lobe feebly produced, and arcu- 

 ately emarginate in front of scutellum; disk moderately convex, with 

 two round, shallow median depressions, of which the posterior one 

 is slightly more deeply depressed, a broad, deep depression along 



