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 wing as in 
Oreorichla, 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 Geotichhe are inhabitants of the African, Indian, Eastern 
Palsearctic, and Malayan Regions. One species from America, 
Geocickla nocvia, 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). 
Geocickla 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, 
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 ; culrnen, o'S ; wing, 
4*65 : tail, 3'i ; tarsus, i‘i. 
Adult Female.— General colour above warm olive-brown, in- 
clining to slaty-brown on the lower back and rump; wing-coverts 
