392 PYCNONOTID A. 
Genus XANTHIXUS Oates, 1889. 
This genus was created by Oates for the reception of Yanthivus 
flavescens, a species differing from all its nearest allies in having 
the tail-feathers strongly craduated. The outermost tail-feather 
falls short of the longest by a distance equal in length to the 
tarsus; the crest resembles that of Hemixus flavala and the wing 
that of Jolpastes. 
There is only one species, which I divided into two races in 1917, 
one of which was again renamed by Kloss in 1919 on the grounds 
that I had renamed the original race from Arrakan instead of the 
new race. I have again compared the fine series in the British 
Museum and find that my original distribution is quite correct. 
Kloss’s name sordidus therefore becomes a synonym of my vividus. 
The types of flavescens from Arrakan, which are in the Indian 
Museum and were inspected by Kloss, are probably discoloured 
by age, as fresh specimens from ‘Arrakan and the Chin Hills show 
beyond all doubt that they belong to the same form as that from 
Assam and not to the more yellow form from Eastern Burma. 
Kloss’s birds from Annam may quite possibly be yet another 
form, though I cannot distinguish any differences, in which case 
they would retain the name sordidus. 
Xanthixus flavescens. 
Key to Subspecies. 
A. Below paler, grey ofabdomen slightly suffused [cens, p. 892, 
with yellow” not extending to breast ...... AX. flavescens flaves- 
B. Below darker on breast and flanks and ‘pepe 
extending to breast or even to throat ...... X. fl. vividus, p. 393. 
(408) Xanthixus flavescens flavescens. 
Briyvra’s BRENT 
Pycnonotus flavescens Blyth, J. A.S. B. ) XIV, p. 568 (1845) (Arrakan), 
Xanthivus flavescens. Blant. & One i, p. 275. 
Vernacular names. Dao bulip-gurrmo (Cachari). 
Description. Forehead and crown dark brown, the feathers of 
the front half of the crown edged with grey, those of the hinder 
half with olive-green ; upper plumage olive- brown tinged with 
flavescent on the rump ; wings olive-brown; edges of quill-feathers 
elive-green ; tail olive-brown, shafts rather ‘darker brown, the three 
outer pairs “of tail- feathers faintly tipped with yellow ish w hite ; 
lores black; a short supercilium from base of upper mandible 
yellowish white ; cheeks and ear-coverts greenish grey ; chin pale 
grey; throat, breast and flanks grey, slightly suffused with yellow 
on the owen breast ; abdomen dull yellowish ; vent and under 
tail-coverts bright yellow ; ; edge of wing and salen wing-coverts 
fulvous yellow. 
Colours of soft parts. Iris dark brown; bill, legs and feet black. 
