GREY-HEADED OLIVE WOODPECKER. 155 
continued all over the remaining under parts. At 
the bottom of the neck above, the grey is softened 
into an olive yellow without any mixture of green ; 
this spreads uniformly over the back and wings; 
the quills are light brown, crossed and spotted with 
fulvous white ; the rump and upper tail-covers, in 
both sexes, are crimson. In the male there is a 
rich crimson patch, commencing on the middle of 
the crown and extending to the nape ; the tail is 
dark brown without any bands, except some whitish 
spots on the inner and outer margins of the two last 
pair of external feathers ; bill and legs, horn colour. 
The form is typical of this sub-genus, the lateral 
ridge being nearest the margin ; the bill is rather 
higher than broad, and the hinder toe longest. 
Total length about 8 inches; bill, front, 1 ; 
wings, 4/ c ; tail beyond, 1J; base, 3; tarsus, ; 
hind claw, T s s . 
With the last sub-genus we quit the circle of the 
pre-eminently typical woodpeckers ; those, in fact, 
which from having the hinder toe longer than the 
foremost, are endowed with the greatest power of 
climbing. The next genus is Chrysoptilm , in which 
this proportion of the toes is not found ; that is to 
say, the hinder toe is not longer than the correspond- 
ing one in front ; there are other characters, such as 
the gentle curvature of the culmen, or ridge of the bill, 
which, in the last genus, is always perfectly straight. 
