(843) Hippolais obsoleta.
The Desert Tree-Warbler.
Salicaria obsoleta Severtz., Turk. Jevotn., p. 63 (1S73) (Moscow). Hypolais obsoleta. Blanf. & Oates, i, p. 393.
Vernacular names. None recorded.
Description. Whole upper plumage pale sandy-brown; concealed parts of wings and tail pale brown; a well-defined white supercilium from the nostrils to behind the eye white; lores dusky sandy; ear-coverts very pale sandy-brown; below almost white washed with pale sandy-grey, chiefly on the breast and flanks.
Colours of soft parts. The same as in the Booted Tree-Warbler.
Measurements. Wing 63 mm.; tail 46.5 mm.; tarsus 30 mm.; culmen 10.5 mm.
Distribution. Fao, Turkestan and an alleged specimen from Sind identified by Seebohm.
Neither Hartert nor Ticehurst admit this species, but there is no doubt that there are specimens iu the British Museum collection, too pale, too sandy a grey to be rama in any stage of plumage. These might be aberrant specimens but this seems to be unlikely and I retain the species until we know more about it.
Nidification and Habits. Unknown.