258 BULLETIN 14 5, UNITED STATES NATIONAL MUSEUM 



not clothed with long hairs, and the pubescent vittae on the elytra 

 are obsolete. In felix the upper surface is more shining and with 

 scarcely any pubescence, which causes the pubescent vittae to be more 

 prominent, whereas in jacobinus the surface is subopaque, and 

 sparsely, uniformly clothed with short whitish hairs, while the hairs 

 in the vittae are slightly more yellowish, and a little more closely 

 placed. Horn (1891) described both sexes, but both specimens in the 

 Horn collection at present are females. 



88. AGRILUS JACOBINUS Horn 



Figure 6G 



Agrilus jacobinus Horn, Trans. Amer. Ent. Soc., vol. 18, 1891, pp. 314^ 

 315.— Fall, Calif. Acad. Sci., Occasional Papers, no. 8, 1901, p. 120.— 

 Woodworth, Guide to California Insects, 1913, p. 195. — Myers, Journ. 

 Ent. and Zool., vol. 10, 1918, p. 48. — Chamberlin, Cat. Buprestidae, 

 1926, p. 67 (part). 



Male. — Form subcylindrical, feebly flattened above, subopaque, 

 dark brown, with a more or less cupreous and plumbeus tinge; 

 beneath slightly more cupreous and shining than above. 



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

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

 near vertex, and with a narrow, moderately deep depression extend- 

 ing from the occiput to epistoma; surface rugose on the occiput, and 

 the entire surface nearly concealed by long, recumbent, whitish 

 pubescence; epistoma slightly transverse between the antennae, and 

 rather deeply, arcuately emarginate in front; antennae extending to 

 about middle of pronotum, serrate from the fifth joint, and the outer 

 joints slightly wider than long; eyes rather large, and about equally 

 rounded above and beneath. 



Pronotum only feebly wider than long, base and apex about equal 

 in width, and widest near middle; sides feebly, arcuately rounded 

 from apical angles to behind middle, then more obliquely narrowed 

 to near the posterior angles, where they are parallel and the posterior 

 angles rectangular ; when viewed from the side the marginal and sub- 

 marginal carinae are strongly sinuate, widely separated anteriorly, 

 and connected to each other near the base ; anterior margin strongly 

 sinuate, with the median lobe strongly, broadly rounded ; base feebly 

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

 rounded and subtruncate in front of scutellum; disk strongly convex, 

 without median depressions, but with broad, shallow, lateral depres- 

 sions, and sharply defined, strongly arcuate prehumeral carinae, the 

 carinae extending from posterior angle inward along base, then 

 forward to near the middle of pronotum; surface coarsely, densely 

 rugose, the rugae more or less transverse and interrupted, finely 



