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 tlian 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 ttie Lieyden Miuseum, Vol. XXI. 



