03. ELANUS. 339 



wing-coverts black, as in the other species ; quills grey, much 

 darker, almost blackish below ; fore part of the head, eyebrow, sides 

 of the face, and entire underparts pure white ; feathers round the 

 eye black, especially in front of it ; under wing-coverts and axil- 

 laries pure white, excepting the outer lower coverts, which are 

 black, the lowest shading into greyish black ; cere pale yellow ; bill 

 black ; feet pale yellow ; iris reddish orange. Total length 13 inches, 

 culmen 1, wing 11-5, tail 6-2, tarsus 1*45. 



Young. Similar to the adult, but more ashy brown, and having 

 the feathers of the back, as well as the quills and tail, tipped with 

 white ; fore part of head and a broad eyebrow white, with narrow 

 dusky brown shaft-streaks ; under surface white, streaked with 

 rufous brown, the sides of the breast rather rufescent. 



Hah. Australia. 



a. Ad. St. S. Australia. Sir George Grey [P.]. 



h. Juv. St. Australia. Lady Carington [P.]. 



c. Ad. sk. Austi-alia. Lady Carington "P.J. 



d. Ad. sk. Port Albany. Purchased. 



e. Ad. sk. Interior of Austi-alia. Purchased. 

 /. Juv. sk. Queensland. Purchased. 



g. Ad. sk. Moreton Bay. J. Gould, Esq. [P.]. 



4. Elanus leucurus. 



Alcon bianco, Azara, Ajnint. i. p. 165 (1802) ; Hartl. Lid. Azara,^. 3 



(1848). 

 Milvus leucurus, Vieill. N. Diet. d'Sist. Nat. xx. p. 563(1818); J)' Orb. 



Voy. Amer. Merid., Ois. p. 98 (1847). 

 Elanoides leucurus, Bonn, et Jleill. Ene. Meth. iii. p. 1205 (1823). 

 Falco melanopterus, Bp. Journ. Philad. Acad. v. p. 28 (1825). 

 Falco dispar, Temm. PL Col. i. pi. 319 (1825) ; Bp. Am. Om. ii. p. 18, 



pi. ] 1. lisr. 1 (1828) ; Audub. B. Am. pis. 351, 352, et Om. Biogr.'w. 



p. 367 (1838). 

 Milvus dispar, Less. Man. d'Orn. i. p. 99 (1828). 

 Elanus dispar, Cuv. Rigne An. i. p. .334 (1829). 

 Elanus leucurus, Bp. Comp. List B. Eur. 8f N. Am. p. 4 (1838) ; Gray, 



Gen. B. i. p. 26 (1845; ; Cab. in Schomb. Reis. Guian. iii. p. 735 



(1848) ; Bp. Consp. i. p. 22 (1850) ; Cass. B. Calif. 8,- Texas, p. 106 



(1855) ; Strickl. Om. Sijn. p. 138 (1855); Bimn. th. Bras. ii. p. 112 



(1856) ; Cass, in Baird's B. N. Am. p. 36 (18C0) ; Schl. Mm. P.-B. 

 Milvi, p. 8 (1862) ; Gray, Hand-l. i. p. 28 (1869) ; Pelz. Om. Bras. 

 pp. 6, 398 (1871) ; Cooper, B. Calif, ed. Baird, p. 489 (1872) ; Coues, 

 Key N. Am. B. p. 211 (1872) ; 8cl. ii, Salv. Nomencl. p. 120 (1873) ; 

 Schl. Revue Acmpitr. p. 130 (1873). 



Adult. Above pale bluish grey, the head lighter, silvery grey, the 

 forehead, eyebrow, sides of the face, and underparts pure white ; 

 least and median wing-coverts black, but not forming so large a black 

 shoulder as in the other species ; a little patch on the outside of the 

 wing black ; rest of the wing-coverts and inner secondaries pale 

 bluish grey like the back ; primaries brown, greyish externally ; tail 

 pure white, the two centre feathers ashy grey ; under wing-coverts 

 and axillaries entirely white, excepting the lowest, which slightly 

 incline to ashy grey ; a small patch of black on the outer feathers of 



2 A 2 



