164 MISC. PUBLICATION 1 4 7 0, U. S. DEPT. OF AGRICULTURE 



Male. — Moderately elongate, rather strongly depressed above, piceous and 

 strongly shining on elevated spaces, bronzy cupreous and moderately shining in 

 depressed areas ; beneath purplish brown, with a distinct bronzy-green reflection 

 in certain lights, and more strongly shining than above. 



Head bright bronzy green, becoming cupreous on occiput, with a rather broad, 

 smooth, longitudinal carina on occiput, and two small, round, smooth callosities 

 on front; front flat; surface coarsely, confluently punctate, sparsely clothed 

 with long, erect, inconspicuous hairs, intervals finely granulose ; clypeus broadly, 

 deeply, angularly emarginate in front, broadly rounded on each side. Antenna 

 uniformly bright bronzy green, gradually narrowed to apex ; intermediate seg- 

 ments not compact, as long as wide, subtruncate at outer margins ; third seg- 

 ment nearly as long as following two segments united. 



Pronotum nearly twice as wide as long, narrower at apex than at base, widest 

 near apical fourth ; sides strongly, arcuately converging near apical angles, 

 subparallel at middle, arcuately converging posteriorly; anterior margin 

 broadly, arcuately emarginate, without a median lobe ; base shallowly, arcuately 

 emarginate on each side, median lobe moderately produced, and narrowly sub- 

 truncate in front of scutellum; disk slightly convex, uneven, with an obscure, 

 broad, densely punctured, median sulcus, limited on each side by a slightly 

 elevated, less densely punctured space, and with a more or less distinct, oblique, 

 sparsely punctured space on each side toward lateral margin ; surface coarsely, 

 deeply, irregularly punctate, clothed with a few inconspicuous hairs, intervals 

 obsoletely granulose. 



Elytra distinctly wider than pronotum, twice as long as wide; sides nearly 

 parallel from humeral angles to apical third, then arcuately converging to 

 tips, which are separately rather broadly rounded ; lateral margins coarsely 

 serrate ; basal depressions broad and deep ; humeral depressions broad and 

 shallow ; disk slightly convex ; surface glabrous, rather coarsely, densely, ir- 

 regularly punctate in the depressions. Each elytron with three more or less 

 distinct, longitudinal costae ; first strongly elevated from apex to in front of 

 middle, then extending to base into an irregular, smooth space ; second and 

 third strongly interrupted, forming irregular, narrow, smooth spaces, and with 

 an obliquely placed, densely punctured fovea at apical third between first and 

 third costae, and a smaller one near middle interrupting second costa. 



Abdomen beneath finely, sparsely, irregularly punctate, sparsely clothed with 

 short, semierect, inconspicuous hairs, intervals obsoletely granulose ; sternites 

 smooth along anterior and posterior margins, without lateral callosities ; last 

 visible sternite deeply, arcuately emarginate at apex, with an indistinct sub- 

 marginal ridge on each side at basal half, lateral margins coarsely serrate ; 

 eighth tergite deeply, angulately emarginate at apex, finely granulose, coarsely, 

 densely punctate, but not longitudinally carinate. Presternum coarsely, con- 

 fluently punctate, rather densely clothed with long, erect, inconspicuous, white 

 hairs ; anterior margin with a wide, short, median lobe. Anterior femur with 

 a large, moderately obtuse tooth, which is coarsely dentate on outer margin. 

 Anterior and middle tibiae strongly arcuate, the former with a broadly rounded 

 dilation on apical third, the latter gradually expanded near apex; posterior 

 tibia nearly straight. 



Length 11.5 mm., width 4.75 mm. 



Eedescribed from the male lectotype, No. 3437, in the Academy of 

 Natural Sciences of Philadelphia, 



Female. — Differing from the male in having the head and antenna uniformly 

 reddish cupreous, the prosternum sparsely, coarsely punctate, and sparsely 

 pubescent, the last visible sternite deeply, narrowly notched at apex, the 

 eighth tergite broadly rounded at apex, and coarsely, confluently punctate, and 

 the tibiae unarmed at apices. 



Type locality. — Tyngsboro, Mass. 



DISTRIBUTION 



From material examined : 



Indiana : Millers, July 12, 1915. 



Maine: Paris, June 30 to July 19 (C. A. Frost). 



Manitoba: Victoria Beach, August 5, 1923 (J. B. Wallis). 



Massachusetts: Tyngsboro, July 13 to August 10, type series (Fred Blanchard). 



