(573) Turdus castaneus gouldi.
Gould's Grey-headed Thrush.
Merula gouldi Verr., Nouv. Arch. Mus. d'Hist. Nat. vi, p. 34 (1871) (W. Setchuan).
Vernacular names. Daokat gagao iaba (Cachari).
Description.— Adult male. Similar to the Grey-headed Thrush but much darker, the head and neck are dark brown-grey and less abruptly defined from the chestnut back. Chestnut above and below much richer and there is no central pale streak on the abdomen.
Colours of soft parts as in castaneus.
Measurements. Wing 137 to 148 mm.: tail 104 to 106 mm.; tarsus 34 mm.; culmen 23 mm.
Distribution. Eastern Tibet to Kansu and Tsinling. In winter this form is found as far West as Assam, a single specimen having been obtained by Mr. H. Stevens at Dejoo in Lakhimpur in March. Possibly some, if not all the South Assam and Burmese records of T. castaneus castaneus refer to this bird. Two males shot by me in the Khasia Hills and one in North Cachar were certainly all Gould's Thrushes and I have a note recorded at the time referring to their exceptionally dark rich plumage. A specimen in the British Museum from Nepal is undoubtedly referable to this race. There are also two specimens from Yunnan.
Nidification and Habits. Practically nothing recorded.