( 15 ) 
THE MOULTS OF THE BRITISH PASSERES, 
WITH NOTES ON THE SEQUENCE OF THEIR 
PLUMAGES. 
BY 
H, F. WITHERBY. 
Parr: VIIT. * 
(Continued from Vol. X, page 290.) 
Genus Locustella. 
Tue adults of the four British species of this genus have 
a complete moult in late summer or autumn. extending in 
some to December. The determination of the spring moult 
is unfortunately uncertain in some of the species owing 
to want of material. Savi’s Warbler does not appear to 
have a spring moult, while the Lanceolated Warbler certainly 
has a complete spring moult, and so probably has our Grass- 
hopper Warbler, as its eastern representative certainly has. 
Pallas’s Grasshopper-Warbler appears to moult its body- 
feathers only, but this also is uncertain for want of material. 
Examples moulting from juvenile to first winter are also 
scarce or altogether lacking in the collections I have examined, 
but it is interesting to note that in addition to the body- 
feathers and some of the wing-coverts the tail also moults, at 
all events in some of the species. 
In all the species the sexes are alike, and there are scarcely 
any differences in winter and summer plumages. The 
juveniles are very much like the adults, but they are always 
distinguishable. First winter birds are like the adults in 
two of the species, while in the other two they may be dis- 
tinguished by careful comparison. 
Savi’s WARBLER (Locustella 1. luscinioides). 
Apvuutts.—Complete moult in late summer. Apparently 
no moult in spring, and abrasion has little effect, but both 
the upper- and under-parts become rather paler. Sexes 
alike. 
JUVENILE.-—Like the adult, but rather darker and more 
reddish-brown on the upper-parts. 
First WiIntER.—Apparently like the adult. Unfortunately 
no specimen moulting from the juvenile to first winter 
plumages has been available for examination. 
* For previous Parts see Vol, IX, pp. 148, 167, 239, 314; Vol. X, 
pp. 11, 126 and 280. 
