Mr. It. Swinhoe on Formosan Ornithology . 393 
that the mature female at times partially acquires the masculine 
garb. I think the former, though this specimen is more of the 
proportions of the females, which are smaller and shorter in the 
wing than those of adult males. 
Cyornis vivida *, nobis (Ibis, 1864?, p. 363), $, shot Novem¬ 
ber 1865. This specimen has a decidedly shorter bill than 
the ordinary run of males. Bill blackish-brown. Legs and 
claws brown. Head and hind-neck deep ashy-grey, which colour 
mingles with olive on the back. On the rump the olive stands 
alone. Quills and tail hair-brown, washed with olive, and mar¬ 
gined on the coverts with reddish olive-green, and on the quills 
with light olive-buff. Tail brown, tinged with red, and broadly 
margined with reddish, chiefly towards its base. Lores, orbits, 
and throat buff, mottled with olivaceous. Axillaries and vent 
yellow-ochre. Quills on the under-wing edged interiorly with 
whitish. Middle of the belly and flanks with more or less pure 
white; rest of under parts light olivaceous, washed with light 
buff, and here and there smeared with ochreous-buff. Wing 
3'5 inches long. Size that of the male. This specimen has one 
vivid blue feather on the hind-neck, and one of the scapulars is 
edged with blue. The tibiae are brownish-olive. 
Another specimen, also apparently a female, has a longer bill 
and is of similar sober plumage, but has the coronal feathers 
tinged with blue in the middle and a touch of blue on several 
feathers of the back and rump. 
Graucalus rex-pineti shows no tinge of olive in the adult. 
Space round the bill, the orbits, and the entire face, throat, and 
under-neck are black, getting fainter on the breast. The speci¬ 
mens vary much in all their proportions, and by their variation 
in hue seem to show the bird to be some time in acquiring the 
full plumage, maturely-clad individuals being rare. Judging 
from a comparison of specimens, I do not believe that there is 
any constant difference between the sexes. I saw in England a 
skin very similar to our adult bird. I forget whence it came; but 
* [As on two former occasions, we avail ourselves of the kindness of M. 
Jules Vsrreaux to illustrate the present paper by a figure (Plate XI.) of 
the tpe-specimen of this species, which he has sent us for that pur¬ 
pose.— Ed.] 
