1933 ] 
Notes on Hippoboscidae 
75 
— -Texas: Dallas. — Nevada: without more definite locality. 
— Mexico: Grito (in which State?). — -In addition there are 
reliable published records from Washington, D. C., Georgia, 
Nebraska and Kentucky. 
The host list is a very large one, including owls, hawks 
and other birds of prey, as well as grouse: Great Horned 
Owl, Bubo virginianus (Gmelin), (very common on several 
subspecies); Barred Owl, Strix varia Barton; Long-eared 
Owl, Asio wilsonianus (Lesson) ; Barn Owl, Tyto alba 
pratincola (Bonaparte) ; Screech Owl, Otus asio (Lin- 
naeus) ; Pigeon Hawk, Falco columbarius Linnaeus; Sharp- 
shinned Hawk, Accipiter velox (Wilson) ; Red-tailed Hawk, 
Buteo borealis (Gmelin) ; Broad-winged Hawk, Buteo 
platypterus (Vieillot) ; Rough-legged Hawk, Buteo lagopus 
sancti-j ohannis (Gmelin) ; Red-shouldered Hawk, Buteo 
lineatus (Gmelin) ; Western red-tailed Hawk, Buteo bore- 
alis calurus (Cassin) ; Marsh Hawk, Circus hudsonius 
(Linnaeus) ; Cooper’s Hawk, Accipiter cooperi (Bona- 
parte) ; Golden Eagle, Aquila chrysaetos (Linnaeus) ; Gos- 
hawk, Astur atricapillus (Wilson) ; and Ruffed Grouse, 
Bonasa umbellus (Linnaeus). At the Mus. Comp. Zool. 
there is also an old specimen, without locality, labelled “off 
wild turkey.” Sometimes the parasite is very abundant. 
C. W. Johnson records a Great Horned Owl that yielded 
32 flies and some pupae, the latter hidden in the ears. 
Owing to frequent confusion with related species (par- 
ticularly with L. fusca) , some previously published records 
of hosts and localities are unreliable. Two old specimens 
labelled “Nevada” at the Mus. Comp. Zool., and one speci- 
men from St. Augustine, Florida, in the C. W. Johnson Col- 
lection, are true L. americana. But all other specimens I 
have seen from west of the Rockies and from Florida were 
L. fusca. Published records from Oregon (Cole and Lovett, 
1921, Proc. California Ac. Sci., (4) XI, p. 344; Falcoz, 1930, 
Encyclop. Entom., Diptera, V, p. 48), and California (C. W. 
Johnson, 1922, Psyche, XXIX, p. 83; in addition to those 
mentioned before), are all open to question. There is one 
definite record of L. americana from Mexico, but how 
widely it is distributed there is unknown. Falcoz’ indica- 
tion “Columbia” refers to Washington, D. C., not to British 
