BULWERIA. 69 



Genus BULWERIA Bonaparte. (Page 54, pi. XIY., fig. 5.) 



Species. 



Common Characters. — Plumage entii'ely dusky sooty brownish darker on 

 upper parts. 



a}. Greater wing-coverts rather light sooty grayish brown, like lower parts; above 

 dark sooty brown, paler on greater wing-coverts, nearly black on lesser wing- 

 coverts and quills ; lower parts uniform sooty grayish brown. Downy young : 

 Uniform dark sooty brown. Length about 10.00, wing 7.70-8.00, tail 4.50- 

 4.75, graduated for 1.45-1.75, culmen .85-1.00, tarsus .90-1.10, middle toe .95. 

 Egg 1.73 X 1-22. Hab. Eastern Middle Atlantic, chiefly in the vicinity of 

 the Canaries and Madeira ; accidental at Bermudas and near coast of Green- 

 land 101. B. bulweri (Jard. & Selby). Bulwer's Petrel. 



a\ Greater wing-coverts blackish, like rest of wings. (" Like T. bulweri, but with 

 bill rather larger; and it is without the sooty brown on the wings." — 

 Gray.) 



B. macgillivrayi (Gray). Macgillivray's Petrel.^ 



Genus DAPTION Stephens. (Page 55, pi. XII., fig. 3.) 



Species. 



Lower parts (except chin and throat), rump, upper tail-coverts, and basal two- 

 thirds of tail, together with greater portion of scapulars and secondaries, white; back, 

 rump, and upper tail-coverts, marked with triangular spots of dark sooty plumbeous ; 

 wing, except as described, chiefly sooty plumbeous, as is also the terminal third of 

 the tail; bill deep black; length about 15.00, wing 10.25-11.00, culmen about 1.25. 

 Hab. Southern seas in general, north, on Pacific coast of America (accidentally 

 only ?) to California 102. D. capensis (Linn.). Pintado Petrel. 



Genus HALOCYPTENA Coues. (Page 56, pi. XII., fig. 4.) 



Species. 

 Plain sooty blackish, lighter and more brownish on lower parts, middle and 

 greater wing-coverts, and fore part of head ; bill and feet unifoi-m black ; length 

 about 5.75, wing 4.80, tail 2.50, the outer feathers .40 shorter; culmen .45, tarsus 

 .85, middle toe .60. Hab. Coast of Lower California. 



103. H. microsoma Coues. Least Petrel. 



Genus PROCELLARIA Linn^us. (Page 56, pi. XVII., fig. 4.) 



Species. 

 Common Characters. — General color sooty blackish, paler or more sooty 

 grayish below, the upper tail-coverts white ; bill and feet wholly black. 



^ Thalaesidroma {Bulweria) Macgillivrayi G. R. Gray, Cat. Birds Isl. Pacific, 1859, 56. 



