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were observed by him on the 31st August (O. S.) at the village of Belgu, near the mouth of the 

 Gorin; and at the Nikolaieffsk post he saw it in 1854 on the 19th September, and from then to 

 the 14th October, during which time considerable flocks were seen amongst the larch trees on 

 the shores of the Amoor and its small tributaries the Karnr, the Litsch, and the Patcha, and 

 were very noisy. Toward the end of the time he only observed single birds ; and the last was 

 observed on the 14th October. Mr. Maximowicz shot one at the Mariinskischen post on the 

 13th October; and Mr. Maack obtained it in the Bureja Mountains on the 13th September. As 

 regards the information given by Dr. Kadde, it is rather difficult to decide how far it can be 

 utilized ; for he has confused the different species of Thrushes most completely, as may easily be 

 ascertained by comparing his plates and descriptions with specimens of the birds. Thus, under 

 Tardus fuscatus he refers both to Turdus naumanni and the present species, and his Turdus 

 ruficollis is nothing but the true Turdus naumanni. He says that " Turdus fuscatus" breeds at 

 the head-waters of the Irkut, on the borders of the tree-growth, near the frontier posts of 

 Turansk and Chaginsk, where he met with young birds barely fledged on the 2nd July, 1859 ; 

 but it is uncertain whether this refers to the present species (Turdus dubius) or to Turdus 

 naumanni. According to Mr. Taczanowski (J. f. O. 1872, p. 437) it is a common bird on 

 passage in Dauria, arriving with Turdus ruficollis and Turdus naumanni. The first arrive in 

 the spring on the 12th or 13th May; and in the autumn they remain to the 12th October. 

 This species, he adds, breeds on the Angara, in the vicinity of Ussola. He also says (J. f. O. 

 1875, p. 246) that he received two adult specimens from the mouth of the Ussuri. Pere David 

 speaks of it as being abundant on passage in Mongolia; but Colonel Prjevalsky says (Orn. Misc. 

 pt. vi. p. 196) that he only once met with a flock of this species, in the Shura-had Mountains, in 

 South-eastern Mongolia, during migration. At Lake Hanka they migrate during April and the 

 beginning of May, usually in company with Turdus naumanni, and, like that bird, do not breed 

 there, but go further north for that purpose. In China the present species appears to be 

 tolerably common on passage ; Mr. Swinhoe informs me that it breeds there ; and he has given 

 me an egg which, he assures me, is undoubtedly authentic. Captain Blakiston obtained it at 

 Hakodadi, in Japan, late in October, and says (Ibis, 1862, p. 319) that he "observed it in 

 considerable numbers in the woods around Volcano Lake on the 20th of that month, when 

 they seemed to have but just arrived from the north. Their habits appeared exactly like those 

 of the Missel-Thrush of Europe ; and the note of recognition was a similar kind of squeak." I 

 may also add that in a collection I have lately received from Yedo there is a very fine series of 

 this species in full breeding-plumage. 



The Dusky Thrush is also stated by Dr. Jerdon (B. of India, i. p. 530) to be a very rare 

 winter visitant to the N.W. Himalayas. 



From what I can gather respecting the habits of this bird, it appears to resemble our 

 European Fieldfare or the Misseltoe-Thrush in general habits ; and its note is said to be loud 

 and harsh. I have no details respecting its nidification ; but the egg received from Mr. Swinhoe 

 closely resembles some of those of the Misseltoe-Thrush in my collection, but is rather smaller. 

 In 1871 (see P. Z. S. 1871, p. 104) I exhibited at a meeting of the Zoological Society some 

 eggs sent to M. Verreaux by Dr. Dybowski as those of the present species ; but subsequently I 



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