82 



6 



those with plain backs, as they cannot well be mistaken for White's Thrush. The species which 

 approaches most nearly to Tardus varius is Tardus dauma ; but this latter species may be distin- 

 guished, not only by having twelve rectrices, but by having the second quill intermediate in 

 length between the fifth and the sixth, whereas in Tardus varius it is intermediate between the 

 fourth and fifth. 



I take this opportunity of acknowledging with thanks the assistance rendered by the 

 Marquis of Tueeddale, who has kindly lent me his whole series of Thrushes allied to the 

 present bird; and I have therefore been able to examine a considerable number of specimen- 

 (with those in the British Museum) of the different species included in the above list. 



The bird described and figured is an adult male from Lake Baikal, in my own collection. 



In the preparation of the above article I have examined the following specimens of Turd us 

 varius : — 



E Mas. II. E. Dresser, 

 a, 6 ml. Lake Baikal, April l!)th {Dr. DybowsM). 



E Mus. Lord Twecddale. 



a. .Manilla, b, 6- Tonghoo, January 17th, 1876 (R. G. IVardlaw Ramsaij). c. Camphor Hills, Formosa 

 18(i-.> [R. Swinhoe). 



E Mus. Brit. Beg. 

 a, b. Japan. 



E Mas. II. Seebohm. 

 a Aumv, Maivh 1866. b, ,-• . Ainoy, March 7th, 185 ( J (R. Swinhoe). 



