Falco. 



53 



bars on the under surface are narrower, v.ider apart, and some- 

 times irregular. Total length 17 inches, wing 13'3, tail 7"5, 

 tarsus 2'05 ; bill from forehead I'l, from gape 1"35, culmen, 1"25. 



Young. The young of both sexes somewhat resemble the adults. 

 The under surface is of a more fawn-coloured or ferruginous hue 

 from the chest downwards ; the chest is streaked with dart-shaped 

 markings, and the breast and abdomen ■with longitudinal markings 

 of blackish brown ; the flanks and thighs barred with bracket- 

 shaped, and the legs with hastate markings of the same colour; the 

 axillaries and under wing-coverts are centered and barred with 

 blackish brown ; the upper surface is tinged -with brown, the quills 

 margined at the tips with buffy white ; all the feathers of the body 

 above margined with fulvous, more broadly on the wing-coverts, 

 secondaries, and upper tail-coverts. 



Habitat. Derby (N. W. Austr ), Port Denison, Wide Bay 

 District, Eichmond and Clarence Elvers Districts, New South 

 Wales, Victoria, South and West Australia, Tasmania. 



A 1 (3^ ad. sk. Lithgow, New South Wales. Exch. 



A 2 2 ad. sk. New South Wales. Pres. 



B 1 5 semi-ad. sk. Port Lincoln, South Australia. Col. 



B 2 2 semi-ad. sk. Lachlan River, NeAV South Wales. Poll. 



C 1 (^ juv. sk. Sherwood, New South Wales. Pres. 



2. Falco hypoleucus. 



7Vie Grey Falcon. 



Falco hypoleucus, Gould, Proc. Zool. Soc, 1840, p. 162; Gnii/, Gen. 

 Bds., vol. i, p. 19 (1845) ; Goidd, Bds. Amtr., vol. i, pi. 7 (1848) ; 

 Sturt, Expad. Centr. Ait.itr., App., vol. ii, p. 13 (1849) ; Bonap. 

 Comp. Av., torn, i, p. 24 (1850); Strkhl. Orn. Syn., p. 80 (1855) ; 

 Gould, Handhl: Bds. Austr., vol. i, p. 24, sp. 7 (1865); Gray, 

 Hand-list Bds., vol. i, p. 18 (1869); Sharpe, Cat. Bds. Brit. Mus., 



