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



Male. — Broadly elongate, slightly convex above, rather strongly shining, 

 piceous, with a vague purplish reflection on elevated spaces, bronzy green in 

 depressed areas ; beneath bronzy green, with a distinct cupreous tinge, and 

 more strongly shining than above; tarsi violaceous black. 



Head bright green, with two small, smooth callosities on front, and a smooth, 

 longitudinal carina on occiput ; front nearly flat ; surface coarsely, deeply, 

 confluently punctate, sparsely clothed with moderately long, semierect, incon- 

 spicuous hairs, clypeus deeply, broadly, angularly emarginate in front, sub- 

 truncate on each side. Antenna bronzy green on basal segments, gradually 

 narrowed to apex; intermediate segments not compact, about as long as wide, 

 broadly rounded at outer margins; third segment one-half longer than fourth; 

 fourth to eleventh segments with the lobes partially yellowish testaceous, tha 

 testaceous area increasing in size from the fourth to the eleventh segment. 



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

 along middle ; sides sinuate and nearly parallel at middle, converging anteriorly 

 and posteriorly, more arcuately toward apical angles ; anterior margin broadly, 

 arcuately emarginate, without a distinct median lobe ; base transversely sinuate 

 on each side, with median lobe slightly produced, and truncate in front of scutel- 

 lum ; disk slightly convex, uneven, with a broad, longitudinal, median depres- 

 sion, limited on each side at apical half by an irregular, elongate, smooth, 

 elevated callosity, and on each side midway between this callosity and lateral 

 margin with a number of more or less connected, irregular, smooth callosities; 

 surface coarsely, densely, deeply, irregularly punctate between the smootn 

 callosities, and clothed with a few short, erect, inconspicuous hairs. 



Elytra wider than pronotum, three-fifths longer than wide, widest behind 

 middle; sides feebly diverging from humeral angles to behind middle, then 

 arcuately converging to tips, which are separately broadly rounded; lateral 

 margins slightly serrate ; basal depressions elongate and deep ; humeral depres- 

 sions rounded and moderately deep, surface glabrous, uneven, densely, finely, 

 irregularly punctate in depressed areas. Each elytron with four more or less 

 distinct, longitudinal costae; first strongly elevated on apical half, interrupted 

 basally, sinuate near apex ; second and third indicated by short ridges and 

 callosities, jointed to each other and first costa : and fourth slightly indicated 

 basally, and following outline of lateral margin. 



Abdomen beneath rather densely, irregularly fossulate-punctate, more conflu- 

 ently and forming crenulate ridges at sides, sparsely clothed with short, re- 

 cumbent, white hairs, without distinct lateral callosities, intervals indistinctly 

 granu'ose ; last visible sternite semicireularly emarginate at apex, slightly 

 elevated at sides but without a distinct submarginal ridge, lateral margins 

 serrate ; eighth tergite deeply, angularly emarginate at apex, coarsely, densely 

 punctate posteriorly, densely, finely granuose anteriorly, but not longitudinally 

 carinate. Prosternum confluently, coarsely .punctate, transversely rugose an- 

 teriorly, sparsely clothed with moderately long, semierect, white hairs ; anterior 

 margin broadly rounded and strongly dellexed at middle, but without a distinct 

 median lobe. Anterior femur with an obtusely rounded tooth, which is dentate 

 on outer margin. Anterior and middle tibiae arcuate, the former with a large, 

 triangular dilation at apex, and the latter gradually expanded toward apex; 

 posterior tibia nearly straight. 



Length 14 mm., width 6.5 mm. 



Redescribed from the male type. No. 2696, in the Museum of 

 Comparative Zoology, Cambridge, Mass. 



Female. — Differing from the male in having the front of the head usually 

 more bronzy green, the last visible sternite more elongate and narrowly, deeply 

 emarginate at apex, the eighth tergite rounded or vaguely emarginate at 

 apex, and more coarsely, densely punctured, and the anterior tibia unarmed 

 at apex. 



Type locality. — Wales, Maine. 



DISTRIBUTION 



From material examined : 



Connecticut: New Haven, reared (R. B. Friend). 

 Maine: Wales, July 23, 190S, type (C. A. Frost). 



Massachusetts: Arnold Arboretum, Boston, July 12, 1921 (H. . Morrison). 

 Tyngsboro, July 12, 1896 (Frederick Blanchard). 



