MADEIRA STORM PETREL. 
143 
round and round with rapid beats of its long wings, very much 
hke a Swallow or a Swift. We finally lost sight of it as it flew 
behind a large stack of rock and went out to sea. This bird, 
•during its sojourn in St. Kildaat any rate, is almost exclusively 
nocturnal in its habits, and keeps close to its hole during the 
day. The egg is incubated by both parents, for I took male 
and female birds from the nests ; but, as previously stated, I 
never met with two birds in the same hole. Most of the nine 
fggs I obtained were quite fresh, but three of them were slightly 
incubated. When I dissected the Petrels we caught, I found 
the stomachs to contain an oily substance mixed with little bits 
of sorrel.” 
Nest. Of dry grass, with round stalks and dry blades, with a 
SCTap or two of moss, and a few bits of lichen and roots 
{Dixon). 
Egg’S. One. Dull white, with a zone of minute dots of 
very pale lilac round one end, in rare instances the spots 
bang spread over the entire surface. Axis, i -2-1 ’re: incLs- 
diam., o'95-i-o. ’ 
THE MADEIRA STORM-PETREL. OCEANODROMA CRYPTOLEUCURA. 
Cymochorea cryptoleuaira, Ridgway, Proc. U.S. Nat. Mus iv 
P- 337 (1882). 
Oceanodroma cryptole.uaira, Baird, Brewer, and Ridgway 
Water-Birds, N. Amer. ii. p. 406 (1884); Salvin, Cat. b! 
^us. ,xxv. p. 350 (1896); Boyd Alexander, Bull. 
-D. O. Club, V. p. xxxvii. (1896). 
{,Plate CX/c.) 
Adult Male. — CTeneral colour above sooty black, the greater 
wmj^coverts browner externally, with light brown edges ; quills 
black, the inner secondaries greyer on the outer webs, which 
^ "’ith boary white ; upper tail-coverts 
''' broadly tipped with black ; hgad and neck 
sooy -back, with a slight shade of greyish; under surface of 
body sooty-brown, including the ' ' 
I n,' 1 . 7 central long under tail- 
coyerts the lateral ones being white, with broad black tips ; 
ail-feathers black, white at the base, the white extending 
further on the outer ones ^ under wing-coverts black, the 
