McAtee — Membracidae of the Vicinity of Washington, D. C. 125 



FF. Larger, color decidedly greenish, 

 horns less strongly curved, 

 genital segment of female 

 with a narrow acute cleft 



taurina. 



C. albescens Van Duzee.— Plumniers Id., Md., Aug. 27, 1905, McAtee; 

 Sept. 29, 1907, A. K. Fisher; Scott's Run, Va., July 4, 1918, McAtee; Dead 

 Run, Va., Aug. 6, 1915, R. C. Shannon; Hyattsville, Md., Aug. 4, 1907, 

 F. Knab. 



C. borealis Fairmaire.— Fairly common; all records so far are from 

 Piedmont^ localities, the dates of capture ranging from June 29 to Oct. 4, 

 P. 1.2 



C. brevitylus Van Duzee. — Common in both Coastal Plain and Piedmont 

 localities, season April 22 to July 23. P. I. 



C. bubalus Fabricius. — Fairly common, generally distributed; dates of 

 collection extend from July 23 to Aug. 30. P. I. 



C. constans Walker.— Washington, D. C, Aug. 1, 1908, McAtee; July 2, 

 1917, M. Taylor. 



C. diceros Stal. — Plummers Id., Md., July 19, 1914, Maryland near 

 Plummers Id., July 13, 27, 1913, McAtee; Branchville, Md., Aug. 19, 1919, 

 L. L. Buchanan; Oxon Run, Md., Sept. 6, 1915, McAtee; .^Iarshali Halli 

 Md., June 24, 1890, O. Heidemann; Kensington, Md., Aug. 1, 1898, F. C. 

 Pratt; Washington, D. C, May 25, 1903, E. S. G. Titus. 



C. taurina Fitch.— Beltsville, Md., June 23, 1918, adult and nymphs, 

 McAtee. 



Ceresa palmeri Van Duzee, a form of rather northern range, was taken at 

 Poolesville, Md., July, 1898, F. C. Pratt, and at Bluemont, Va., July 1, 

 1914, McAtee. 



STICTOCEPHALA Stal. 



S. lutea Walker. — Very common and generally distributed; has been 

 collected from April 27 to July 7. P. I. 



Slidocephala inermis Fabricius and S. substriaia Walker apparently 

 should occur here, but they have not yet been collected. 



ACUTALIS Fairmaire. 



A. tartarea Say. — The only species collected here has two color varieties 

 Avhich may be distinguished by the following characters: 



A. Tegmen with only the veins dark, only disk of pronotum black 



var. semicrema. 

 AA. Tegmen more extensively darkened, whole pronotum black 



var. tartarea. 



iFor explanation of the physiographic areas of the District of Columbia region, see 

 Bui. 1, Biol. Soc. Wash., 1918. A Sketch of the Natural History of the District of Columbia 

 by W. L. McAtee. 



2P. I. signifies occurrence on Plummers Island, Md., and V. P. I. in the vicinty of that 

 locality. 



