No. 4.] COUES'S OKNITII. BIBLIOGRAPUY FALCONID^. 7«7 



1879. Warren, B. H. Diurnal Kapacious Birds of Chester Couuty [Peunsylvania]. 

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

 Treating of 15 spp. of Falconidce. 



1879. [Vennor, H. G.] The Dark Gyr Falcon [Falco saccr labradoms]. <^Fore8i 



and Stream, xii, June 2G, 1879, p. 406. 

 Ifotice of specimens in the writer's collection. 



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



cephalus.) < Jbwrn. of Sci. (Toledo, Ohio), n. s., iii, No. 2, Feb. 15, 1880, cut. 

 1880. RiDGWAY, R. Description of the adult plumage of Hierofalco gyrfalco obso- 

 letus. < Bull. Nutt. Ornith. Club, v,No. 2, Apr,, 1880, pp. 93-95. 



This is the dark American continental form of Gyr Falcon, named J'', labradora by Audu- 

 bon, here identified with F. oisoletut Gm., and varietally distinguished from the othei races. 



