AKT. 13 MmroAE OF DIST. OF COLUMBIA KNIGHT AND McATEE 3 



PLAGIOGNATHUS FLAVOSCUTELLATUS Knight 



Plummer Island, Md., June 7, 1914, McAtee; July 20, 1926, on 

 willow, Knight. 



PLAGIOGNATHUS ANNULATUS var. CUNEATUS Knight 



Great P'alls, Md., June 18. Barber; Plummer Island, Md., June 6, 

 1905, August 19, 1902, Schwarz and Barber; June 17, 1913, J. D. 

 Hood. 



PLAGIOGNATHUS CARINATUS Knight 



Forest Glen, Md., June 2, 1913, Heideman; Great Falls, Md., May 

 23, 1915, McAtee; Beltsville, Md., July 3, 1926, on persimmon. 

 Knight. 



PLAGIOGNATHUS SERICEUS Heidemann 



Abundant on flowers of various species of 2"dki in the parks and 

 streets of Washington, dates May 27 to June 20 ; has been taken also 

 at Beltsville, Md., June 9, 1915, and at Odenton, Md., June 20, 1913, 

 McAtee. 



PLAGIOGNATHUS NIGROLINEATUS Knight 



Dyke, Va., May 28, 1913, on Rhu^s glabra^ McAtee, probably at- 

 tracted only to flowers; known to breed on Quercus in other localities. 



PLAGIOGNATHUS ATRICORNIS Knight 



Glen Echo, Md., July 10; Bladensburg, Md., July 23, 1890, "on 

 black birch "; Forest Glen, Md., July 6, 1913, Heidemann. 



PLAGIOGNATHUS ALBIFACIES Knight 



Fairly common ; dates of collection range from July 6 to Septem- 

 ber 15. " P. I. 



PLAGIOGNATHUS BLATCHLEYI var. NUBILUS Knight 



Washington, D. C, June 12, August 7, 1884, September 5, 1890, 

 October 2, 1889 ; Great Falls, Va., August 10, 1906, Heidemann. 



PLAGIOGNATHUS ALBATUS rar. ALBATUS Van Duzee 



Fairly common and well distributed ; has been collected as early as 

 May 2 and as late as July 12. P. I. 



PLAGIOGNATHUS ALBATUS var. VITTISCUTIS Knight 



Washington, D. C, July 15, 1894, Heidemann; Branchville to 

 Beltsville, Md., June 4, 1914, E. R. Kalmbach ; Great Falls, Md., May 

 23, 1915; Glencarlyn to mouth of Four-mile Run, Va.. June 17, 1914, 

 McAtee. 



