1922] J ohnson — Notes on Distribution and Habits of Bird-Flies 83 
I am using it for the American species. It has been taken from 
the following species of birds: 
Great Blue Heron ( Ardea lierodias ) T. Say. 
Black-crowned Night Heron ( Nycticorax nycticorax). Alston, 
Boston, Mass., Aug. 1, ’12; Hampton, N. H., May 13, ’17 
(S. A. Shaw) ; Delaware River, below Philadelphia, Oct. 
15 ’96 (C. Liebeck).- 
Little Blue Heron ( Florida ccerulea). Bristol Isl., Delaware 
River (Fowler). 
White Heron or Egret ( Herodias egretta). St. Augustine, Nov. 
8, ’87. 
American Bittern ( Botaurus lentiginosus) . Delaware River 
below Philadelphia, Sept. 13-Oct. 12, ’85 (C. Liebeck). 
Least Bittern ( Ixobrychus exilis ). Delaware River below 
Philadelphia, Sept. 18, (C. Liebeck). 
Olfersia americana (Leach) 
This species is known to frequent the following birds: 
Great Horned Owl ( Bubo virginianus) . Wenham, Mass., Dec. 
2, TO (Dr. J. C. Phillips), Dover, Mass., Dec. 24/94 (A. 
P. Morse), San Jose, Cal. (W. Holden). 
Barn Owl ( Aluco pratincola). San Jose, Cal. (W. Holden). 
Long-eared Owl ( Asio wilsonianus) . Hampton, N. IE, Apr. 9, 
’09 (S. A. Shaw). 
Barred Owl ( Strix varia ). Framingham, Mass., Nov. 1/10 
(C. A. Frost). 
Screech Owl ( Otus asio floridanus) . St. Augustine, Fla. (C. W.J.) 
Western Screech Owl ( Otus mecallii). Calif. (M. C. Z) . 
Red-shouldered Hawk ( Buteo lineatus). Wenham, Mass., Aug. 
14/14 (J.C. Phillips), Sherborn, Sept. 21/98, (A. P. Morse); 
Dunmore Lake, Vt. (C. E. Brown). 
Red-tailed Hawk ( Buteo borealis ). Illinois (M. C. Z.). 
Broacl-wingecl Hawk ( Buteo platypterus) . Texas (G. IP. Rags- 
dale). 
Pigeon Hawk ( Falco columbarius) . (B. S. N. H.). 
