OF WASHINGTON, VOLUME XIX, 191? 113 



Neoconocephalus robustus var. crepitans Scudder. 



Plummers Island, September 2, Caudell; September 17, 1904, 

 H. A. Allard; September 29, 1907; Maryland near Plummers 

 Island, July 27, 1913, McAtee. Plummers Island, August 29, 

 1912 (nymph), Caudell, September 1, 1907 (nymph), A. K. 

 Fisher; Great Falls, Md., August 15, 1915 ^mph); Maryland 

 near Plummers Island, August 16, 1914, McAtee. 



Neoconocephalus triops Linnaeus. 



Plummers Island, August 2, September 4, 9, and 24, October 

 28, Barber and Schwarz; October 12, 1906, A. K. Fisher; Black 

 Pond, Va., September 21, 1911, W. D. Appel. ^ 



Orchelimum agile De Geer. 



Plummers Island, August 25, 1912, McAtee; Great Falls, Md., 

 Anglers' Club, Md., August 15, 1915, McAtee; Chesapeake and 

 Ohio Canal, Md., September 25, 1911, Wm. T. Davis; Cabin 

 John, Md., September 23, 1911, W. D. Appel; Great Falls, Va., 

 September 12, 1912; Chain Bridge, Va., September 13, 1916, 

 Caudell. 



Orchelimum laticauda Redtenbacher. 



Common; Plummers Island, August 27 (nymphs and freshly 

 matured adults) to October 26; Maryland near Plummers Island, 

 September 10, 1916, L. 0. Jackson- October 22, 1915, McAtee; 

 Chesapeake and Ohio Canal, Md., September 25, 1911, Wm. T. 

 Davis; Cabin John, Md., September 23, 1911, W. D. Appel; 

 Little Falls, D. C., August 22, 1915, McAtee; Chain Bridge, D. C., 

 September 13, 1916, Caudell; Great Falls, Va., September 12, 

 1912, Caudell; Bellview to Difficult Run, Va., October 3, 1915, 

 McAtee, September 19, 1916, Caudell. 



Orchelimum minor Bruner. 



Song heard on Plummers Island and many specimens taken on 

 Maryland shore nearby, September 6, 1909, H. A. Allard; 

 Great Falls, Va., September 12, 1912, Caudell. 



Orchelimum vulgare Harris. 



Plummers Island, September 2, Caudell; September 5, 1915 

 (nymph and adults), L. O. Jackson and McAtee; September 30, 

 1906, A. K. Fisher; October 22, 1915, Great Falls, Md., August 

 15, 1915, Maryland near Plummers Island, August 18, 1916, 

 Caudell; September 5, 1915. McAtee; Cabin John, Md., Septem- 

 ber 23, 1911, W. D. Appol; Cabin John Run, Md., October 10, 



