MONOGRAPH OF THE PETRELS. 



That these Shearwaters pass on migration along the coasts of Central America, 

 towards the Southern Pacific Ocean, is doubtless the case ; but, as a fact, there are 

 no further records of the species until the Chilian coast is reached. The Rothschild 

 Museum contains specimens from Chile, collected by Mr. Charles S. Reed, at 

 Talcahuano, Peuco, and San Vicente, in November, December, and May. Mr. E. 

 C. Reed has forwarded examples from Juan Fernandez (Salvin, Ibis, 1875, p. 377). 

 Admiral A. H. Markham procured a male in Coquimbo Bay in November (Salvin, 

 P. Z. S., 1883, p. 431), and Mr. A. A. Lane another, at Corral, in Chile. 



During the cruise of the Earl of Crawford's yacht, the " Valhalla," Mr. M. J. 

 Nicoll obtained a specimen in Valparaiso Bay in February. He says that the 

 species was not uncommon, but very shy, and difficult to shoot (Ibis, 1904, p. 51). 



Adult male. General colour above uniform dark brown, with scarcely any sign of 

 lighter edgings to the feathers beyond a few obsolete hoary-whitish margins on the 

 inner secondaries and scapulars, the latter being blackish, like the inner secondaries ; 

 wing-coverts like the back, the greater series shaded externally with ashy-grey, and 

 narrowly fringed with a whitish margin at their ends ; primary-coverts and quills 

 black, browner on the inner web, and having a slight shade of hoary-grey, scarcely 

 distinguishable on the primaries, but evident on the outer web of the secondaries, 

 which have a slight fringe of white at the ends, like the greater coverts ; tail-feathers 

 black ; crown of head, hind-neck, and sides of neck, uniform dark brown, a trifle 

 darker than the back ; lores and sides of face dusky-brown, slightly mottled with 

 ashy, especially below the eye ; upper and lower margins of eye white ; cheeks ashy- 

 grey, mottled with dusky spots, this mottling continued in the form of spots and bars 

 along the sides of the neck to the sides of the upper breast ; under-surface white, the 

 entire sides of the body mottled and freckled with dusky ashy-brown, or blackish, 

 bars near the ends of the feathers, some of which are entirely dusky at the tips ; 

 above the thighs a patch of slaty-brown ; the lower abdomen slightly mottled with 

 dusky-brown bars ; under tail-coverts blackish-brown, with faint edges of lighter 

 brown, almost obsolete ; central bunch of coverts ashy-brown, more plainly edged with 

 hoary-white, those near the vent white, with wavy bars of dusky-brown near the tips ; 

 under wing-coverts white, mottled on the inner edge with dusky-black centres to the 

 feathers, often in the form of spear-shaped spots ; round the carpal bend of the wing, 

 a black bar, more or less broken ; lower primary-coverts white, with a good deal of black 

 on the outer webs, and sometimes a patch at the end of the inner web ; lesser 

 axillaries white, with dusky bars like the adjacent under wing-coverts ; longer 

 axillaries black or ashy-brown, with narrow white tips and more or less white at the 

 base ; quills dark brown below, slightly more ashy on the inner webs ; " bill yellowish 

 flesh-colour, the tip black ; tarsi and feet flesh-colour, the outer toe darker ; iris 

 hazel " (M. J. Nicoll). Total length about 20 inches ; culmen, 1.7 ; wing, 13.0 ; tail, 

 4.4 ; tarsus, 2.1 ; middle toe and claw, 2.6. 



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