120 Mr. G. R. Gray on the Species 
Collocalia hypoleuca. 
Collocalia hypoleuca, G. R. Gr. 
esculenta, p., Wall. 
Upper surface metallic black ; sides of head, throat, and breast 
fuscous black, with the feathers margined with white; abdomen 
pure white; tail metallic black, with a prominent white space on 
the inner web of each lateral feather near the base; under tail- 
coverts metallic black, with the smaller ones broadly margined 
with white. 
Length 4”, wings 4” 1’”, tail 1” 9”. 
Aru Islands, island of Mysol, coast of New Guinea, and 
Celebes ? 
The Mysol specimens exhibit the white space on the first three 
tail-feathers, and a spot only on the fourth. This latter spot I 
am unable to find in the Aru example, as the tail is imperfect. 
It may be observed that the white space on the tail-feathers 
of the Celebes specimen appears to be further removed from the 
tip of the feather ; but the tail is imperfect in the single speci- 
men contained in Mr. Wallace’s collection. When lent to me 
on a former occasion, I had remarked that it differed from the 
Aru example, and I had therefore written on the label “n. sp. 
viridinitens ;” but I did not adopt it at the time, as I thought it 
might be better to await the arrival of other examples before 
describing it. At present I have placed it, with a doubt, with 
the Aru example. 
d. Moutucca Grovr. 
Collocala nidifica, vay. 
Upper surface darker, especially on top of head, with a pur- 
plish tint; and altogether of a smaller size than any of the 
other varieties. 
Length 4” 5’, wings 4, tail 2”. 
Morty Islands. 
Collocalia spilura. 
Collocaha hypoleuca, p., G. R. Gr. 
esculenta, Wall. (nec L.). 
spilura, GR. Gr. 
Upper surface metallic black ; cheek, sides of neck, and throat 
deep fuliginous; breast and beneath the body fuliginous, with 
the feathers broadly margined with greyish white; tail metallic 
black, with a white spot on each of the lateral feathers near 
the middle of the inner web, that on the outer feather very 
small; under tail-coverts metallic black, the smaller ones mar- 
gined with white. 
Length 3” 6”, wings 3” 9", tail 1” 9". 
