418 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.58. 



12. Cell Ri short, about as long as Ra*3 alone (subgenus Empeda Osten Sacken)_ 



E. (E.) noctivagans (p. 419). 

 Cell R2 deep, much longer than iJa+s alone 13. 



13. A stump of a vein in cell first M2; no brown bands on the femora (sub- 



genus jEfopio/a&is Osten Sacken) E. (H.) armata (p. 418). 



No stump of a vein in cell first M2; femora banded with brown (subgenus 

 Acyphona Osten Sacken) 14. 



14. AVings with a broad brown band at the cord and a large brown basal 



spot E. (A.) venusta (p. 419). 



Wings not so marked 15. 



15. Coloration of body and wings more yellowish ; an uninterrupted brown 



band along the cord ; brown bands on the femora less extensive, the 

 yellow area between thera broad ; basal deflection of Cui at the fork 



ofM E. (A.) arniillaris (p. 418). 



Coloration of body and wings more brownish, the markings on the wings 

 less extensive and the band along the cord interrupted; bands on the 

 femora very extensive, the yellowish area between them very narrow; 

 basal deflection of Cui before the fork of If E. (A.) graphica (p. 418). 



The immature stages are spent in wet earth along the banks of 

 streams or other bodies of water. 



• ERIOPTERA ARMATA Osten Sacken. 



Common; season April 26 to September 6; has been collected on 

 flowers of wild plum. P, I. 



• ERIOPTERA ARMILLARIS Osten Sacken. 



Ilyattsville, Maryland, August 3, 1912, F. Knab ; Eastern Branch 

 near Benning, District of Columbia, August 29, 1915, McAtee ; Great 

 Falls, Virginia, October 21, Nathan Banks. 



ERIOPTERA CALOPTERA Say. 



Abundant; extreme dates of collection May 8 and September 23; 

 often comes to light. P. I. 



* ERIOPTERA CHRYSOCOMA Osten Sacken. 



Dead Run, Virginia, June 6, 1914, R. C. Shannon; Beltsville, 

 Maryland, June 23, 1918, McAtee. 



♦ERIOPTERA FURCIFER Alexander. 



Common; season June 9 to August 3; is attracted to light. P. I. 



* ERIOPTERA GRAPHICA Osten Sacken. 



Plummers Island, July 9, 1916, H. L. Viereck; July 14, 1912; Little 

 Falls, District of Columbia, August 22, 1915 ; Beltsville, Maryland, 

 July 10, 1909, McAtee. 



