396. Hypolais caligata.
The Booted Tree- Warbler.
Sylvia caligata, Licht., Eversm. Reise Buchara, p. 128 (1823). Jerdonia agricolensis, Hume, Ibis, 1870, p. 182; Blanf. S. F. ii, p. 330. Hypolais caligata (Licht.), Hume, S. F. vii, p. 396; id. Cat. no. 553 bis; Seebohm, Cat. B. M. v, p. 85; Barnes, Birds Bom. p. 224.
Coloration, Resembles H. rama, from which the present species differs only in size, being smaller, and in having a longer second primary, the tip of this primary being between the sixth and seventh. The best character by which to separate this species from H. rama is the shorter tail, which never reaches a Length of 2.
Lower mandible and edges of upper reddish fleshy; rest of bill dark brown; legs, feet, and claws pale brown; iris dark brown (Davison).
Length about 5; tail 1.9; wing 2.4; tarsus .75 ; bill from gape .55.
Distribution. A winter visitor to the whole of Northern and Central India. I have traced it southwards to Belgaum, and on the east to Mudhupur on the E.I. Railway. It is found on the west as far as Karachi and Hydrabad. It is doubtful, I think, whether this bird remains to breed in any portion of the Himalayas, but Seebohm asserts that it does so in Kashmir. Biddulphi, however, found it in Gilgit only in August and September, when it was probably migrating southwards. It is known to summer in Turkestan and Southern Siberia.