228 MISIC. PUBLICATION 4 7 0, U. S. DEPT. OF AGRICULTURE 



Abdomen beneath coarsely, sparsely, shallowly, irregularly punctate, in- 

 distinctly pubescent, without lateral callosities, intervals densely granulose; 

 last visible sternite broadly truncate at apex, with angles slightly produced, 

 with an indistinct submarginal ridge, lateral margins not serrate ; eighth 

 tergite coarsely, densely punctate, broadly rounded at apex. Prosternum 

 coarsely, confluently punctate, nearly glabrous ; anterior margin with a distinct, 

 long, median lobe. Anterior femur with a large, acutely triangular tooth, 

 which is finely dentate on outer margin. Anterior and middle tibiae arcuate, 

 the former with a rather long, narrow dilation at apex, the latter slightly 

 dilated near apex ; posterior tibia straight. 



Length 7 mm., width 2.5 mm. 



Redescribed from the male type, No. 2708, in the Museum of Com- 

 parative Zoology, Cambridge, Mass. 



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

 violaceous, the last visible sternite more elongate, and sinuately truncate at 

 apex, the legs uniformly violaceous, and the anterior and middle tibiae unarmed 

 at their apices. 



Type locality. — Missouri, no definite locality, the type simply 

 labeled with a lemon-yellow disk. 



DISTRIBUTION 



From material examined: 



District of Columbia: Washington, June 23, 1907 (F. H. Chittenden). 



Illinois: Ziegler, August 5, 1933 (J. Karlovic). 



Kansas : No definite locality. 



Missouri: No definite locality, type. 



New Jersey: Eiverton, July 1, 1925 (R. J. and M. S. Sim). 



Pennsylvania: Philadelphia (H. Soltau). Philadelphia Neck, July 4 (H. A. 



Wenzel). Frankford, June 28 (A. Schmidt). Angora, June 25 (G. M. 



Greene). Glenolden, June 13 (H. A. Kaeber). Franklinville. 

 Virginia: Ft. Monroe, July 16 (Hubbard and Schwarz). Cape Henrv, June 25, 



1932 (H. G. Barber). 



It has also been recorded in the literature from Connecticut, In- 

 diana, Michigan, North Carolina, New York, and Ohio, but some of 

 these records may refer to azurea. 



Host. — It is recorded in the literature as probably breeding in oak, 

 and Chamberlin (1926) gives the host as pin oak {Quercus minor 

 (Marshall) Sargent), which is considered a synonym of post oak 

 {Quercus stellata Wangenheim). 



The color on the dorsal surface of the body is rather uniform in 

 this species, but the pronotum is slightly more greenish and the elytra 

 more brownish in some examples, and the color of the spots on the 

 elytra varies from violaceous blue to greenish blue. The clypeus is 

 either arcuately or angularly emarginate in front. The length is from 

 5.5 to 7 mm. 



This species is identified in our collections as scitula, but it differs 

 from that species in having the dorsal surface of the body violaceous 

 brown, the elytra with violaceous or greenish-blue spots, of which 

 the median one on each elytron is feebly impressed, and the pronotum 

 more finely, irregularly punctate at the middle and more strongly 

 rugose. The male genitalia and dilation on anterior tibia are similar 

 in the two species. Chrysobothris coneinnula may be simply a color 

 variety of scitula, but the specimens of coneinnula examined are 

 rather uniform in color and should be separated from scitula, at least 

 until more material of the latter species is available for study. 

 LeConte described coneinnula from a single specimen, which he iden- 

 tified as a female, but the type is a male. 



