116 BRITISH BIRDS. [VoL. x1. 
Genus Chettusia. 
SociaABLE PLOVER (Chettusia gregaria). 
Aputts.— Complete moult from July to December. In spring 
there is a partial moult involving the body-feathers (not all the 
scapulars), occasionally the central pair of tail-feathers, usually most 
innermost secondaries and their coverts, but apparently not the median 
or lesser coverts and not the rest of the tail-feathers nor the wings. In 
some specimens some winter feathers are retained on the head, upper- 
and under-parts. The winter and summer plumages are distinct. 
The sexes are alike. 
N.B.—The following females examined were not in full breeding 
plumage, viz.: Q adult, South Altai, June 4th, with no black on the 
belly, which was hair-brown; & adult, Feb. 28th, in full body-moult 
and getting hair-brown feathers on the belly, no black feathers 
apparently coming in. Aj, May, South Russia, had the inner primaries 
of both wings in quill. 
JUVENILE.—Male.—Resembles the adult in winter plumage, but 
many feathers of the olive-brown crown are heavily spotted blue-black 
and notched atsides light buff; (inthe adult, those of forepart of crown 
and, in some, some feathers of hinder crown, usually have small spots 
or streaks of black towards the tips of the feathers, otherwise the crown 
is olive-brown, the feathers narrowly tipped warm buff); mantle, 
scapulars, back, rump, innermost secondaries and coverts olive-brown, 
the feathers edged sandy, some of the feathers shaded blackish olive- 
brown subterminally; (in the adult these parts are olive-drab, the 
. feathers with broad fringes of ochraceous-buff); throat and breast 
cream, heavily streaked sepia, with V-shaped marks or central shadings 
of same; (in the adult the breast is suffused palest drab, the feathers 
tipped white or light buff and some of the feathers with V-shaped 
markings, shadings or narrow streaks of olive-drab or olive-brown) ; 
median and lesser coverts olive-brown, broadly edged sandy; (not pale 
olive-drab, tipped light or ochraceous-buff as in the adult). 
N.B.—No female examined. 
First Winter.—Male and female.—The juvenile body-plumage 
(not all the scapulars), occasionally the central tail-feathers, some 
innermost secondaries and coverts, some median and apparently some 
lesser coverts are moulted in late autumn, but not the rest of the wings 
or tail-feathers. The birds now resemble the adults in winter and are 
only to be distinguished by the retained olive-brown juvenile median 
and lesser coverts, with worn sandy edges as compared with the uniform 
fresh pale olive-drab wing-coverts of the adult. 
Frrst StumMER.—Moult as in the adult, but sometimes some median 
and lesser coverts are moulted. The birds are like the adults, from 
which they are distinguished by the narrow, sandy, or creamy edges 
of the retained juvenile wing-coverts least abraded on the innermost 
median and lesser coverts, and by the worn and faded appearance 
of the juvenile median coverts. 
(T'o be continued.) 

