BLUE HAWK, OR HEN-HARRIER. 
391 
Belnn, Hist, Ois, p. 104, — L’Oiseau St Martin, Buff. Ois. i. p. 212. Id. PI. 
Enl. 459, adult male. Gerardin, Tahl. Ehm. Orn. i. p. 43. — La Soubuse, 
Buff. Ois. i. p. 215, pi. 9. Id. PI. Enl. 443, young female; 480, young male. 
Gerardin, Tahl. Elem. Orn. i. p. 37, female and young. — Le Grenouillard, Le 
VaiU. Ois. Afrique, i. p. 63, pi. 23, young. — Kore oder Halbweybe, Bechst. Tasch. 
Heutseh. p. 25, sp. 20. Meyer and Wolf, Ois. d'AUem. liv. 27, pi. 5, adult 
male, pi. 6, female. Naumann, Vog. Heutseh. ed. 2, i. pi. 39, fig. 1, adult male ; 
fig. 2, adult female, pi. 38 ; fig. 2, young male. — Mause Habicbt, Missilauebe, 
Meyer, Boehm. Ahh. vi. p. 313, adult male. — Blue Hawk, Edw. v. p. 33, pi. 225, 
adult male. — Marsb Hawk, Edw. p. 173, pi. 291. Penn. Arct. Zool. sp. 105. 
Lath. Syn. i. p. 90, sp. 75, var. A. female and young. — Asb-coloured mountain 
Falcon, Lath. Syn. i. p. 94, sp. 78, var. A. adolescent male. — Hen-barrier, .£'c?zy. 
pi. 225, very old male. Will. {Angl.) p. 172. Alb. ii. pi. 5. Hayes, Brit, 
Birds, pi. 1. Lewin, Brit. Birds, i. p. 18. Penn. Brit. Zool. i. sp. 58, p. 
28. Lath. Syn. i. p, 88, sp. 74. Id. Suppl. p. 22, adult male. — Ring-tail 
Hawk, Edw. iii. pi. 107. Penn. Arct. Zool. sp. 106, female and young. — Ring- 
tail, WiU. l^Ang.') p. 72. Alh. iii. pi. 3. Hayes, Brit. Birds, fi. 2. Lewin, 
Brit. Birds, i. pi. 18, female. Id. pi. 2, fig. 4, the egg. Penn. Brit. Zool. 
sp. 59. Lath. Syn. i. p. 89, sp. 75. Id. Suppl. p. 22, female and young. — 
Wbite-rumped Bay Falcon, Lath. Syn. p. 54, sp. 34, var. B. young. — Hudson’s 
Bay Ring-tail, Lath. Syn. i. p. 91, sp. 76, young. — White Lannei’, Lath. Syn, 
i. p. 87, sp. 73, adult male. — Grey Falcon, Penn. Brit. Zool. i. sp. 49. Lewin, 
Brit. Birds, i. pi. 15. Lath. Syn. i. p. 82, sp. 67, adolescent male. — New York 
Falcon, Penn. Arct. Zool. ii. p. 209, adolescent male. — Ranivorous Falcon, Xai/i. 
Syn. Suppl. female and young. — White-necked Falcon, Lath. Syn. Suppl. p. 30, 
sp. 101, adult male. South American. — Cayenne Ring-tail, Lath. Syn. i. p. 91, 
sp» 76, var. A. young Falco glaucus, the sharp-winged hawk, of a pale sky-blue 
colour, the tip of the wings black, Bartr. Trav. p. 290, adult male. — Falco sub- 
cceruleus, the sharp-winged hawk, of a dark or dusky blue colour, Bartr. Trav, 
p. 290, adolescent male. — Falco ranivorus, the Marsh Hawk, Bartr. Trav. p. 
290, young. Philadelphia Museum. My Collection. 
CIRCUS Bechstein.* 
Falco (subgen. circus) cyaneus, Bonap. Synop. p. 32. — Buteo (circus) cyaneus? var. 
Americanus. — Hen-Harrier, North. Zool. ii. p. 55. 
As will be perceived upon a slight inspection of our long 
and elaborate list of synonyms, this well-known species is found 
* There still appears to be a difference of opinion regarding the identity of the 
European Circus cyaneus, or hen- harrier, and the North American Falco uligi- 
nusus of Wilson. 
