Genus CRYPTOLOPHA

The genus Cryptolopha contains nine Indian species of Warblers of very bright plumage in which yellow or green is the predominant colour. They approach the Flycatchers in the enormous development of the frontal hairs, but differ from them in the young not being spotted and in having a partial spring moult. This spring moult is confined to the wings and tail. Two specimens of G. castaneiceps procured in Native Sikhim in April and now in the British Museum show this moult in progress, otherwise I should have entertained doubts about it. The plumage of the young is exactly the same as that of the adult. All the species are resident.

In Cryptolopha the bill is about half the Length of the head, very broad and blunt; the rictal bristles are greatly developed and the frontal hairs extend quite up to the culmen and reach beyond the nostrils, in some cases nearly up to the tip of the bill; the wing is somewhat rounded, the first primary being small and the second and third graduated; the tail is moderate, square or slightly forked in some cases.

The Flycatcher-Warblers resemble the Willow-Warblers in their mode of life, frequenting trees and shrubs and feeding on the insects which infest the leaves. They are not known to have any song. They are most numerous on the hills and are somewhat rare in the plains. So far as is known all the species lay pure white eggs.

Key to the Species.

a. Entire lower plumage deep yellow.
a1 Lateral bands on crown black, median band well-defined.
a2. A white ring round eye ; sides of head bluish grey…………….. C. affinis, p. 422.
b2. A yellow ring round eye; sides of head yellowish.
a3. Lateral black coronal bands not extending to forehead…………….. C. tephrocephala, p. 423.
b3. Lateral black coronal bands extending to base of bill…………….. C. burkii, p. 424.
b1. Lateral bands on crown ashy; median band ill-defined,
c2. Lateral bands pale ashy, concolorous with back…………….. C. xanthoschista, p. 425.
d2. Lateral bands dark blackish ashy, much darker than back…………….. C. jerdoni, p. 425.
b. Lower plumage not entirely yellow.
c1. Inner webs of outer tail-feathers white.
e2. Chin grey; crown blackish…………….. C. poliogenys, p. 426.
f2. Chin, throat, and upper breast grey ; crown chestnut……………... castaneiceps, p. 427.
d1. Inner webs of outer tail-feathers not white.
g2. Chin, throat, and under tail-coverts bright yellow ; abdomen white…………….. C. cantator, p. 427.
h2. Whole lower plumage greyish white except under tail-coverts, which are bright yellow …………….. C. fulviventris, p. 428.

BookTitle: 
The Fauna Of British India including Ceylon and Burma
Reference: 
OATES EW. The Fauna of British India, including Ceylon and Burma. Vol.1 1889.
Title in Book: 
Genus CRYPTOLOPHA
Book Author: 
Eugene William Oates, Edited by William Thomas Blanford
Year: 
1889
Page No: 
421
M_ID: 
22938
M_SN: 
Phylloscopus
Volume: 
Vol. 1
Term name: 
id: 
593

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