(552) Ianthia hyperythra.
The Rufous-bellied Bush-Robin.
Ianthia hyperythra Blyth, J. A. S. B., xvi, p. 132 (1847) (Darjiling) Blanf. & Gates, ii, p 108.
Vernacular names. None recorded.
Description.— Adult male. Forehead and supercilium to the nape, lesser wing-coverts and upper tail-coverts bright ultramarine ; ear-coverts, lores and cheeks black; sides of neck and head, upper plumage and exposed parts of wings and tail deep purplish blue ; quills brown ; below bright, deep chestnut; vent and under tail-coverts white ; under wing-coverts pale chestnut.
Colours of soft parts. Iris dark brown or hazel-brown; bill black ; legs dark brown.
Measurements. Total length about 150 mm.; wing 79 to 83 mm. ; tail 54 to 56 mm.; tarsus about 25 mm.; culmen 10 mm.
Female. Whole upper plumage dark rufous olive-brown; rump and upper tail-coverts slaty-blue; tail blackish edged with deep blue; sides of head, throat and neck olive-brown; below rich ochraceous, chin and centre of throat paler and the upper breast more brown ; centre of abdomen and under tail-coverts white.
Colours of soft parts. Iris brown; bill dark brown ; legs dark brown.
Measurements. Wing 75 to 79 mm.; tail about 52 to 55 mm.; tarsus about 24 mm.; culmen 10 mm.
Distribution. Sikkim Eastwards to Sadiya and South to the Khasia and Cachar Hills. Nidification unknown.
Habits. Similar to those of the other species of Ianthia. In summer it is found between 6,000 and 10,000 feet, and in winter some 2,000 feet lower. It is certainly a forest-bird, but practically nothing has been recorded about it.