THE ARCTIC WILLOW-WARBLER. 77 
The above description and measurements are from a male specimen shot 
by Capt. Bingham in the Haundraw valley, Tenasserim. 
This species may be known at a glance by the white streaks on the 
supercilium and sides of the neck. Otherwise it is very close to P. hypo- 
leucus. 
Mr. Davison remarks : — This Babbler I always found in thick forest, 
usually in pairs, but occasionally in small parties. It keeps much more 
to the ground than any PomatorhinuSy hopping about in a very ungainly 
manner. When feeding and undisturbed I have heard them utter a short 
chuckling note. This is especially the case when several are together and 
have got somewhat separated ; one perhaps finding himself alone, and not 
being able to see his comrades, utters this chuckling note, when he is 
immediately answered by another, and then another and another, until 
each has answered, and then all are silent again. When disturbed they 
utter a note of the typical character, hoot, hoot, hoot, but much louder and 
fuller than that of any of the true Pomatorhini that I know 
Their food seems to be exclusively insects of all kinds, ants and huge 
woodlice.^^ 
Family SYLVIID^E. 
Subfamily PHYLLOSCOPIN^. 
Genus PHYLLOSCOPUS, 
81. PHYLLOSCOPUS BOEEALIS. 
THE ARCTIC WILLOW-WARBLER. 
Phyllopneuste boreaUs, Bias. Naum. 1858, p. 313 ; David et Oust. Ois. Chine, 
p. 271. Phylloscopus sylvicultrix, Swinh. Ibis, 1860, p. 53. Phyllopneuste 
javanica {Bp.), Salvad. Ucc. Born. p. 244. Phylloscopus borealis, Seehohm, 
Ibis, 1877, p. 69 ; Dresser, Birds Eur. ii. p. 509, pi. ; IIu77ie ^ Dav. S. F. vi. 
p. 352 ; Hu7ne, S. F. viii. p. 102 ; Seebohn, Ibis, 1879, p. 9 j id. Cat. Birds B. 
Mus. Y. p. 40 ; Oates, S. F. x. p. 222. 
Description, — Male and female. Upper plumage olive-green, lighter on 
the rump ; wings brown, the outer webs edged with olive-green ; wing- 
coverts brown on the inner and olive-green on the outer webs ; the median 
and greater coverts with yellowish- white tips, forming two bars ; tail 
brown, the outer webs edged with olive-green ; a broad and well-defined 
eye-streak, reaching to the nape, yellowish white; lores brown; ear- 
coverts olive, mingled with yellowish ; under plumage white, suffused with 
yellow ; under wing-coverts and axillaries pale yellow. 
