No. 4.] COUES'S OKNITH. BIBLIOGRAPHY FALCONID^. 787 



1879. Wakeen, B. H. Diurnal Eapacious Birds of Chester County [Peunsylvajiia], 

 <[ Daily Local News, vii, No. 154, May 16, 1879, 3 columns. 

 Treating of 15 spp. ot FalconidcB. 



1879. [Vennor, H. G.] The Dark Gyr Falcon [Falco sacer labradorus]. <^ Forest 



and Stream, xii, June 26, 1879, p. 406. 

 IN'otice of specimens in the writer's collection. 



1880. Marshall, D. M. Notes on the Habits of the Bald Eagle. (Haliattus Leuco- 



cephalus.) <^Joiirn. of Sd. (Toledo, Ohio), n. s., iii, No. 2, Feb. 15, 1880, cut. 

 1880. Eedgway, E. Description of the adult plumage of Hierofalco gyrfalco obso- 

 letus. <^Bull. Nutt. Ornith. Club, v,No. 2, Apr., 1880, pp. 92-95. 



This is tlie dark American continental form of Gyr Falcon, named F. labradora by Audu- 

 bon, here identified -witli F. dbsoletus Gm., and varietally distingoislied from the other raoea. 



