27. BUTEO. 171 



more distinctly below, where the interspaces are dull ashy white ; 

 tail greyish brown, tipped with fulvous, and crossed with thirteen 

 blackish bars, the subterminal one slightly the broadest; under 

 surface of body sooty black, with a clearer shade of brown, more 

 distinct on under wing-coverts, which are also tinged with rufous. 

 Total length 20-5 inches, culmen 1-7, wing 15-15, tail 9-2, 

 tarsus 2-85. 



Female (young), Eather larger than the male. Total length 

 23-5 inches, wing 17-3, tail 11, tarsus 3-35. 



Hah. Galapagos Islands. 



a. S ad. sk. Galapagos Islands (Darwm). Zoological Society. Type 



of species. 



b. $ juv. St. Galapagos Islands (^Darwin). Zoological Society. 



c. 2 juv. sk, Galapagos Islands. Sir W. Burnett and Ad- 



miralFitzroy[P.]. Type 

 of B. leucops. 



3. Buteo poliosomus, 



Falco polyosoma, Quoy et Gaim. Foy. de V Uran. Ois. p. 92, nl. 14 

 (1824). ^ ' ^ 



Astur polyosoma, Cuv. Regne A71. i. p. 332 (1829). 



Buteo poliosoma, Less. Traite, p. 82 (^1831) ; Strickl. Orn. Syn. p. 219 

 (1855) ; Sd. P. Z. S. 1860, p. 384 ; Abbott, Ibis, 1861, p. 151 ; Scl. 

 Sf Salv. Nomencl. Av. Neotr. p. 119 (1873). 



Adult. Bluish slate-colour above and below, a little clearer about 

 the head and throat ; lores whitish ; upper and under tail-coverts 

 white, with slaty grey cross bars and mottlings of the same colour ; 

 tail whit^ crossed with about nine narrow bands of slaty grey, and 

 a very broad subterminal band of slaty black ; primaries black, ex- 

 ternally shaded with silvery grey, the secondaries entirely slaty grey 

 like the back, tipped with white ; primaries white at base of inner 

 web, with remains of dusky slate-coloured bars. Total length 22 

 inches, culmen 1-4, wing 15-25, tail 8-5, tarsus 3-4. 



Female (? in changinr/ pluvrnge). AH over blackish slate-colour, 

 excepting the hinder neck, the entire mantle and upper scapidars, 

 the centre of the breast, extending on to the chest and centre of the 

 abdomen, all these rufous portions of the body more or less obscured 

 with slate-colour ; quills black, silvery grey near the base, barred 

 with black ; inner face of quills ashy white, with a few dusky cross 

 bars ; lower back, rump, and upper tail-coverts ashy, the former 

 slightly washed with rufous ; tail ashy white, -nith about nine 

 narrow bars and a broad subterminal band of slate-colour, less 

 distinct below. Total length 22-5 inches, culmen 1-75, wing 15, 

 tail 9, tarsus 3-5. 



Hab. Falkland Islands, Chili, and Tierra del Fuego. 



fl. S ad. st. Port Famine, S. Patagonia {King). Zoological Society. 

 h. Ad. St. Falkland Islands. Antarctic Expedition. 



c. Ad. St, Chili. Mr. Biydges [C.j. 



