42 BULLETIN 145, UNITED STATES NATIONAL MUSEUM 



the tips are rather widely separated, and this is especially true of 

 the claws on the anterior feet, which are not quite as strongly turned 

 inward as those on the middle and posterior feet. 



Hosts. — It has been reared by J. J. Davis from Prickly Ash 

 (Xanthoxylum clavaherculis Linnaeus), and Champlain and Knull 

 (1925) records it breeding in dead Honey Locust (Gleditsia tria- 

 canthos Linnaeus). It has also been recorded by Uhler (1855) on 

 Willow (Salix sp.), but the larvae probably do not live in these trees. 



10. AGRILUS CUPRICOLLIS Gory 



Figure 8 



Agrilus cupricollis Dejean, Cat. Coleopt., ed. 2, 1833, p. 82; ed. 3, 1837, 

 p. 93 (no description). — Gory, Mon. Bupr. Suppl., vol. 4, 1841, pp. 240- 

 241, pi. 40, fig. 232.— LeConte, Proc. Acad. Nat. Sci. Phila., vol. 9, 1857, 

 p. 9.— Horn, Trans. Amer. Ent. Soc, vol. 18, 1891, pp. 297-298.— 

 Blatchley, Canad. Ent, vol. 51, 1919, p. 29. — Frost and Weiss, Canad. 

 Ent., vol. 52, 1920, p. 207.— Chamberlin, Cat. Buprestidae, 1926, p. 58. 



Agrilus arcuatus LeConte (not Say), Trans. Amer. Philos. Soc, vol. 11, 

 new ser., 1859, pp. 242-243. — Crotch, Proc. Acad. Nat. Sci. Phila., vol. 

 25, 1873, p. 92.— Chamberlin, Cat. Buprestidae, 1926, pp. 51-52 (part). 



Male. — Form of ruficollid; head and pronotum shining, aureous 

 or cupreous, the head with a small triangular black space on occiput, 

 and pronotum with a similar black spot along anterior margin at 

 middle; elytra black, and subopaque; beneath black, with a slight 

 purplish tinge, and more shining than above. 



Head with the front wide, feebly convex, slightly wider at top 

 than at bottom, the lateral margins obliquely expanded from bottom 

 to top, and with a rather narrow, very deep, longitudinal depression 

 extending from occiput to middle of front ; surface coarsely, sparsely 

 punctate, more or less rugose, and clothed with a few short, erect, 

 whitish hairs behind the epistoma; epistoma not transverse between 

 the antennae, feebly, narrowly, arcuately emarginate in front, and 

 the anterior margin transversely truncate on each side of the emargi- 

 nation; antennae extending to about middle of pronotum, serrate 

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

 large, elongate, and equally rounded above and beneath. 



Pronotum about three-sevenths wider than long, slightly narrower 

 at base than apex, and widest at apical third ; sides arcuately rounded 

 from apical angles to basal third, then nearly parallel to the posterior 

 angles, which are rectangular; when viewed from the side the margi- 

 nal carina is strongly sinuate, the submarginal carina nearly straight, 

 the two carinae widely separated anteriorly, and connected to each 

 other near basal third; anterior margin slightly sinuate, with the 

 median lobe feebly, broadly rounded ; base feebly emarginate at middle 



