CERTHIA. 435 
taken in early June and the others between the 18th and the end 
of that month. The nest is like those of the rest of the genus, a 
pad of moss, lined with a few feathers and placed high up in 
a crevice or in between the tree and some projecting piece of 
bark. The eggs are like those of himalayana but apparently vary 
greatly in size; twenty-five eggs average 15°8x 11-9 mm. and 
the greatest length and breadth are 16°8x12°6 mm. and the 
least 14°8 x 11:1 and 15-0 11:0 mm. 
Habits. This Tree-Creeper seems to be a bird of rather higher 
elevations than most, never descending below about 7,500 feet in 
the breeding season and ascending up to 10,000 feet. With this 
exception there is nothing special calling for remark about it. 
Certhia discolor Blyth. 
Four races of this species are found within the limits of this 
work, ranging from Nepal to the extreme east of Burma and the 
Shan States; these four include one hitherto undescribed but 
referred to by Oates as being found in Karenni and as being 
inseparable from the Sikkim bird. Further material, however, 
shows that when series from the two places are compared one 
with the other they differ very greatly and can be easily distin- 
guished from one another. 
Key to Subspecies. 
Y »/ 
A. Lower plumage earthy-brown, fulvescent 
on posterior flanks and abdomen ....  (C. d. discolor, p. 435. 
B. Lower plumage more fulvous, especially 
GIRO e bn See ee C. d. manipurensis, p. 437. 
C. Much darker above; chin, throat and 
bveasticddishstul vous) 4s tose! sees C. d. victoria, p. 487. 
D. Very dull, with little ferruginous above 
and no fulvous tint below .......... C. d. fuliginosa, p. 438. 
CO. d. fuliginosa is not unlike C. d. meridionalis Rob. & Kloss, 
Ibis, 1919, p. 609, but can be distinguished by its paler lower 
plumage which is more a smoky grey than dark grey and without 
any tinge of rufous on the belly. 
(451) Certhia discolor discolor. 
THe SrkKim TREE-CREEPER. 
Certhia discolor Blyth, J. A. 8S. B., xiv, p. 580° (1845) (Darjeeling) ; 
Blanf. & Oates, i, p. 331. 
Vernacular names. Saddyer-pho (Lepcha). 
Description. Upper plumage dark brown, streaked with fulvous ; 
rump and upper tail-coverts bright ferruginous ; tail bright reddish- 
brown with red shafts and obsoletely cross-rayed; wings dark 
ARQ 
