Mr. R. 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-pmeti 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 Verreaux 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.] 



