WHITE-BODIED CATERPILL AB-CATCHEE. 251 
longer. All the upper part of the plumage is of a 
delicate light grey, which slightly margins the true 
and spurious quills, which are black : the fore part 
of the neck and its sides, the ears, and as far as the 
breast, is entirely grey ; much darker, in the male, 
than the upper plumage, and ending abruptly on 
the breast w T here it forms a curre and becomes 
almost black ; all the rest of the under parts are 
pure white. The female differs in having the breast 
like the back, softening off on the chin and on the 
body to white. The tail is black, the middle and 
lateral feather on each side grey. 
Total length, 10 ; bill, from the gape, 1 ; wings, 
5| ; tail beyond, 2 4 - ; from the base, 5 ; tarsus, p’ s . 
