284 GREATER WHITE-CROWNED ROCK-THRUSH. 
terminal half. Bill black; legs pale. The fifth 
quill is the longest, and reaches the length of the 
under tail-covers. 
Total length nearly 10 inches ; hill from the gape, 
1 ; wings, 4/j ; tarsus, l/ s ; hind-toe and claw, 
; tail from the base, 5. 
LESSER WHITE-CROWNED THRUSH. 
Petrocinda albicaptlla, Swains. 
PLATE XXXII. 
Above cinereous-brown ; beneath, and lateral tail feathers, 
rufous ; ears, front, and sides of the head, black ; stripe in 
tho middle of the crown white ; nuchal collar rufous. 
This elegant little thrush is very considerably smaller 
than the last, which it so much resembles, being not 
much longer than seven inches. It is also a much 
rarer species ; while, by its close affinity with our 
Betrocincla •eociferans* and superciliosa t, it esta- 
blishes the natural generic union of these three 
birds, which, in many respects, so closely resemble 
their prototypes, the red-starts and the stone-chats 
( Saxicola ). 
* Turdus vociferans, Zool. III., i. p. 180 The Reclam- 
meur of Le Vaill., Ois. d’Af. iii. pi. 104. 
•f Le Janfredric, Le Vaill., Ois. d’Af. iii. pi. 111. 
