DUTCH BORNEO-EXPEDITION. 259 
it is wanting the blue shade of the latter on back and 
breast. As the learned author does not mention any further 
details about the plumage of the adult birds, it may be 
useful to give here a plain description. 
Adult male: General color sooty black, somewhat darker 
on the fore-parts above and below; these darker parts are, 
especially when viewed under a certain light, more or less 
strongly glossed with purplish blue, the hind margin of 
each feather being of that color; lesser wing-coverts glossy 
purplish blue, rest of the wing throughout sooty brown, 
outer under wing-coverts white at their larger basal half, 
thus forming a.small white area which is preceded by 
some purple-shaded feathers. Feathers on back, rump, flanks, 
breast and abdomen pure white over nearly their basal 
half, this color decreasing in extent on mantle and chest, 
where it is reduced to mere white shaft-streaks, while it 
is entirely wanting on head, neck, throat, upper- and under 
' tail-coverts and on the thighs. — Iris dark brown, bill 
and feet black. Wing 14,4 cm.; tail 8,2; tarsus 4,5; cul- 
men 3,3. 
Adult female: Similar to the adult male, but some- 
what lighter and showing, over nearly the whole plumage, 
a hue of olive-brown when seen under a certain light; the 
purplish gloss is less obvious than in the male, the pur- 
plish blue shoulder-spot, however, hardly less strongly de- 
veloped. It is also somewhat smaller than the male. The 
second female seems to be somewhat younger, being lighter 
brown and larger, its wings depassing in length those of 
the adult female. 
A young male, to judge from its spotted plumage, is 
still browner and differs, moreover, from the adult birds 
in having drop-like white shaft-streaks on the sides of 
head and neck, on throat, chest, breast and abdomen and 
even on the under tail-coverts, the drop-like shape of these 
streaks being strongly visible on chest and breast, reminding 
our European Nutcracker. The under wing-coverts and the 
edge of the wing are almost entirely white. This specimen, 
Notes from the Leyden Museum, Vol. XXI. 
