246 ALLEN'S NATURALIST'S LIBRARY. 



gated plumage, differing in the colour of the sexes, and having 

 the same white patch on the inner face of the wins as in 

 Oreodchla, but not possessing the golden banded plumage of 

 the latter genus. The axillaries, however, are of the same 

 type as in the Golden Thrushes, being exactly the opposite of 

 the under wing-coverts i.e., if the under wing-coverts are 

 black with white tips, the axillaries are white with black tips. 

 The Geocichlce are inhabitants of the African, Indian, Eastern 

 Palaearctic, and Malayan Regions. One species from America, 

 Geocichla navia^ is included by Mr. Seebohm in the genus. 



THE SIBERIAN GROUND-THRUSH. GEOCICHLA SIBIRICA. 



Turdus sibiricus, Pall. Reis. Russ. Reichs., iii., p. 694 (1776); 



Saunders, Man., p. 12 (1889). 

 Geocichla sibirica, Seeb., Cat B. Brit. Mus., v., p. 180(1881); 



id. Br. B., i., p. 204 (1883). 



Adult Male. General colour above dark slaty-grey ; the 

 feathers paler slaty-grey on the margins ; wing-coverts like 

 the back ; bastard-wing, primary-coverts, and quills dark 

 brown, externally slaty-grey ; centre tail-feathers like the back, 

 the remainder black, washed with slaty-grey on their outer 

 edges, the two outer feathers white at the tips ; head a little 

 darker than the back, relieved by a very broad white eyebrow 7 , 

 which extends to the sides of the nape; lores dusky; ear- 

 coverts and sides of face slaty-black ; under surface of 

 body slaty-grey, a little more dusky on the throat, and paler 

 on the sides of the body and flanks ; centre of breast and 

 abdomen pure white, the under tail-coverts white, mottled 

 with slaty-grey bases ; thighs slaty-grey ; under wing-coverts 

 black ; edge of wing white ; axillaries white, with dusky black 

 tips ; quills blackish below, the base of the inner webs white, 

 forming a broad band; bill black; tarsus in front, toes and 

 claws greenish-yellow, the hinder aspect of the tarsus dirty 

 yellow ; iris brown. Total length, 9 inches ; culmen, 0*8 ; wing, 

 4-65: tail, 3'i ; tarsus, IT. 



Adult Female. General colour above warm olive-brown, in- 

 clining to slaty brown on the lower back and rump; wing-coverts 



