GEOCICHLA. 



175 



31. Geocichla andamanensis. 



Geocichla albogulnris, Bhjth, apud Tfalden, Ibis, 1874, p. 138 ; apud 

 Hume, Str. F. 1874, p. 2'2\.i^partim) ; apud Hume, Str. F. 1870, p. 289 

 ( purtim). 

 Geocichla andamanensis, Walden, Ann. Nat. Hist. 1874, p. 156; 

 Hume, Str. F. 1874, p. 49-5. 

 This is a smaller bird than O. citrina, but resembles it pre- 

 cisely in colour, with the following exceptions : — -The slate-grey 

 of the upper parts is slightly darker, but not so dark as in G. 

 ruhiicula ; the crown, extending more or less onto the nape, is 

 brownish chestnut, instead of orange-chestnut ; the lores and chin 

 are greyish white, instead of being nearly concolorous with the head 

 and throat ; there are only traces of pale tips to the tail-feathers, 

 and the wings are without any white bar, the median wing-coverts 

 being, like the rest, uniform slate-grey on the outer webs, and dark 

 brown on the inside webs ; the underparts vary from orange-chestnut 

 to dark orange-chestnut as in G. citrina. Bill, legs, &c. as in G. 

 citrina. 'Wing with the third, fourth, and fifth primaries nearly 

 equal and longest, second primary intermediate in length between 

 the sixth and seventh, bastard ])rimary i-05 to 0"8o inch. Length 

 of wing 4-2 to 3-8 inches, tail 3-1 to '2-ii, culmen 0'8.5 to 0-8, tarsus 

 1-2.5 to 1-2. 



The female differs from the male in having the upper back, 

 scapulars, and the portions of the secondaries and wing-coverts which 

 are slate-grey in the male suffused with olive-green. No change of 

 importance is produced by the autumn moult. The ear-coverts of the 

 female, and what I presume to be males in the first or second J'ear, 

 are obscurely tipped with brown ; but this disappears in what I 

 presume to be old males. Young in first 2Jlumafie unknown. 



The Andaman Ground-Thrush is principalh' confined to tbe 

 Andaman Islands, where it appears to be a resident. It has also 

 been recorded from Java. 



a. c? ad. sk. S. Andamans, Mar. .3, 1874 R. B. Sliarpe, Esq. [P.]. 



(Capt. Wimberley). 



32. Geocichla albog^ularis. 



Geocichla albogularis, Bhith, J. A. S. B. xvi. p. 146 (1847) ; Hume, 

 Str. F. 1874, p. 221 (purtim) ; id. Str. F. 1876, p. 289 (partim). 



Geocichla innotala, Bhjth, 5 , apud Bh/lh, Cat. B. Mus. As. Soc. 

 p. 163 (184U) ; apudBp. Cimsp. i. p. 'lliS (18.50). 



This species has the size and wing-formula of G. andamanensis, 

 but has the forehead, crown, and nape a rich dark orange-chestnut, 

 as rich as, but slightly darker than, those of G. ruhecula ; the lores, 

 chin, and upper throat are nearly wliite, and the rest of the under- 

 parts intermediate between typical examples of G. citrina and G. 

 ruhecula. The slate-grey of the upper parts, and the rest of the 

 plumage, including the bill, legs, &c., with the exception of the 

 parts above mentioned, is the same as in G. andamanensis. Length 

 of wing 4-2 to 3-9 inches, tail 2-9 to 2-6, culmen 0-8.5 to 0-79, tarsus 

 1-26 to 1-2, bastard primary 1-1 to 0-9. 



