120 BULLETIN" 14 5, UNITED STATES NATIONAL MUSEUM 



36. AGRILUS QUERCICOLA, new species 



Figure 28 



Agrilus acutipennis var., Bkitton, Jouru. Econ. Eut., vol. 9, 1916, p. 3S4. 



Agrilus acutipennis Burke (not Mannerheim), Journ. Econ. Ent., vol. 10, 

 1917, p. 331.— Frost and Weiss, Canad. Ent., vol. 52, 1920, p. 247 — 

 Ohamberun, Cat. Buprestidae, 1920, pp. 47—48 (part). 



Male. — Form slightly more slender than quadriimpressus Ziegler, 

 feebly shining, and feebly flattened above ; head and pronotum green, 

 and usually with a cupreous or aureus tinge; elytra black, with a 

 feeble violaceous or greenish tinge; beneath green, sometimes with 

 an aeneous tinge, and more shining than above. 



Head with the front rather narrow, nearly flat, about equal in 

 width at top and bottom, only obsoletely impressed on the occiput, 

 lateral margins slightly, arcuately rounded at middle, and with a 

 narrow, longitudinal groove extending from occiput to middle of 

 front; surface coarsely, densely punctate in front, becoming longi- 

 tudinally rugose on the occiput, and sparsely clothed with short, 

 inconspicuous hairs, which are more distinct near the epistoma; 

 epistoma rather wide between the antennae, and broadly, arcuately 

 emarginate in front; antennae extending to middle of pronotum, 

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

 eyes large and about equally rounded above and beneath. 



Pronotum not quite one-half wider than long, the base and apex 

 about equal in width, and widest in front of middle; sides feebly, 

 arcuately rounded from apical angles to behind the middle, then more 

 obliquely narrowed to the posterior angles; when viewed from the 

 side the marginal carina is strongly sinuate anteriorly, the subrnar- 

 ginal carina straight or feebly sinuate, the two carinae narrowly 

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

 terior margin feebly sinuate, with a broadly rounded median lobe; 

 base slightly emarginate at middle of each elytron, the median lobe 

 broadly rounded, and subtruncate in front of scutellum; disk mod- 

 erately convex, with a broad, obsolete depression in front of scutellum 

 (sometimes evenly convex and without any depression), a broad, 

 shallow depression on each side along margin, and without pre- 

 humeral carinae; surface densely, coarsely, transversely rugose on 

 median part, densely granulose and finely punctate between the rugae, 

 becoming more coarsely punctate toward the sides, and without dis- 

 tinct pubescence. Scutellum strongly, transversely carinate, and 

 the surface finely reticulate. 



Elytra slightly wider than pronotum at base, about equal in width 

 at base and apical third; sides nearly parallel for a short distance 

 behind base, slightly, broadly, arcuately constricted in front of mid- 

 dle, arcuately rounded at apical third, then obliquely attenuate to the 



