66 NORTH AMERICAN BIRDS. 



Top of head, and upper parts generally, except upper tail-coverts, 

 uniform dusky, the back and scapulars paler, with perceptibly 

 still paler terminal margins to the feathers ; upper tail-coverts, 

 basal half (approximately) of tail, head and neck, except top 

 of the former (and sometimes the hind-neck also), together with 

 lower parts, including axillars and under wing-coverts, pure 

 white; the sides of the chest sometimes with a brownish gray 

 wash; length 14.00-16.00, wing 11.40-11.75, tail 4.80-5.30 

 (graduated for 1.25-2.00), culmen 1.22-1.38, tarsus 1.40-1.45, 

 middle toe, with claw, 1.98-2.10. Hob. Middle Atlantic, strag- 

 gling to coasts of North America (Florida and Long Island) 

 and Europe.... 98. JE. hasitata (KUHL). Black-capped Petrel. 

 i 2 . Plumage of lower parts chiefly or entirely dusky. 



c 1 . Upper tail-coverts pale smoke-gray or grayish white, in marked 

 contrast. 



Entirely (except upper tail-coverts) uniform sooty brownish, 

 rather paler and grayer below ; wing 10.80-11.00, tail 4.95-5.00 

 (graduated for 1.18-1.20), tarsus 1.38-1.40, middle toe, with 

 claw, 1.95-2.00. Hob. Jamaica and adjacent portions of Carib- 

 bean Sea. 



JE. jamaicensis (BANCROFT). Jamaican Petrel. 1 

 c 2 . Upper tail-coverts dusky, like rest of plumage. 

 d 1 . Wing more than 9.50. 



e l . Plumage sooty black above. 



Lower parts very dark sooty slate, the feathers white 

 beneath the surface ; wing 10.75-12.00, tail 4.50-5.60 

 (graduated for about 1.20), culmen 1.35, tarsus 1.55- 

 1.60, middle toe, with claw, 2.20-2.40. Hab. Southern 

 Atlantic, and Antarctic Ocean in vicinity of Kerguelen 

 Island. 



JE. atlantica (GoiTLD). Atlantic Petrel. 1 

 e 2 . Plumage slaty or dark sooty grayish or plumbeous above. 



/*. Larger (wing more than 11.00); wing 11.20, tail 4.55, 

 culmen 1.10, tarsus 1.25, middle toe, with claw, 1.80. 

 Hab. South Atlantic (vicinity of Trinidad Island). 



/E. trinitatis GIGL. & SALVAD. Trinidad Petrel. 8 

 f\ Smaller (wing less than 11.00) ; wing 9.68-10.20, tail 4.17- 

 4.35, culmen 1.05-1.08, tarsus 1.35-1.46, middle toe, 

 with claw, 1.69-1.78. Hab. Southern oceans. 



BL. brevirostris (LESS.). Short-billed Petrel. 4 



1 Procellaria jamaicensis BANCROFT, Zool. Jour. v. 1828, 81. CEstrelata jamaicensis A. A E. NEWTON, 

 Handb. Jam. 1881, 117. 



J Procellaria atlantica GOULD, Ann. Mag. N. H. xiii. 1844, 362. 



JEstrelata trinitatis SALVAD. A GIGL., Ibis, 1869, 65. SALVIN, Rowley's Orn. Misc. pt. iv. 1876, 253 

 pi. 32. 



* Procellaria brevirottrii LESS., TraitS, 1831, 611. (Eetrelata brevirostris SALVIN, Rowley's Orn. Misc. pt. 



