130 Proceedings of the Biological Society of Washington. 



L. L. Buchanan; Odenton, Md., July 4, 1913, Dyke, Va., May 19, 1918, 

 McAtee. Has been taken on Quercus alba. 



Subgenus CYRTOLOBUS Goding. 



C. fenestratus Fitch. — Branchville to BeltsviUe, Md., June 4, 1914, 

 McAtee; Washington, D. C, June 30, 1919, L. L. Buchanan. 



C. inermis Emmons. — BeltsviUe, Md., June 14, 1914, June 15, 1913, 

 June 23, 1918, Washington, D. C, June 6, 8, 1906, McAtee. 



C. intermedius Emmons. — Branchville to BeltsvUle, Md., June 4, 1914; 

 BeltsviUe, Md., June 14, 1914, June 23, 1918; Mt. Vernon, Va., June 6, 

 1915, McAtee. 



C. ovatus Van Duzee. — BeltsviUe, Md., June 8, 1919, L. L. Buchanan. 



C. sculptus Fairmaire.— BeltsviUe, Md., May 25, 28, 1919, May 31, 1920, 

 June 14, 1914; Odenton, Md., July 12, 1914; Dyke, Va., May 28, 1915, 

 McAtee; Woodridge, D. C, May 15, 1915, E. R. Kalmbach. Has been 

 taken on Quercus marilandica. 



C. vau Say. The most common species of the genus; dates of collection 

 range from May 28 to July 12. Has been taken on Quercus alba and Q. 

 minor. 



OPHIDERMA Fairmaire. 



Key to the Species. 



A. Color (in cabinet) uniform yellowish .flava. 



AA. Color darker with pale crossbands. 



B. Color usually castaneous, crossbands faint flavicephala. 



BB. Color usually paler, crossbands conspicuous pubescens. 



O. flava Goding. — Dunn-Loring, Va., Aug. 30, 1916, McAtee. 



O. flavicephala Coding.— BeltsviUe, Md., May 28, 1919, L. L. Buchanan; 

 June 14, 1914, June 23, 1918, on Quercus alba, McAtee. 



O. pubescens Emmons. — Forest Glen, Md., May 28, 1914, at light, O. 

 Heidemann; BeltsviUe, Md., May 25, 1919, May 31, 1920, Washington, 

 D. C, June 8, 1906, McAtee. 



Another species, O. salamandra Fairmaire, has been recorded from the 

 District of Columbia (Van Duzee, Catalogue, 1917, p. 550.) 



POLYGLYPTINI. 



A. Pronotum more or less elevated, the surface with longitudinal ridges, 

 sometimes reticulated. 

 B. Pronotum strongly compressed and elevated, the crest 



divided by a deep notch Entylia p. 131. 



BB. Pronotum less compressed and elevated, with a shaUow 



notch Publilia p. 132. 



AA. Pronotum transversely rounded, without longitudinal ridges 



Vanduzea p. 130. 

 VANDUZEA Goding. 



V. arquata Say. — Abundant everywhere on black locust (Robinia 

 pseudacacia) , adults have been collected May 28 to Oct. 5. P. I. 



