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 Avith 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. Hah. Middle Atlantic, strag- 

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

 and Europe.... 98. iE. hasitata (Kuhl). Black-capped Petrel. 

 h"^. Plumage of lower parts chiefly or entirely dusky. 



c^. 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), tai'sus 1.38-1.40, middle toe, with 

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

 bean Sea. 



2E.. jamaicensis (Bancroft). Jamaican Petrel.* 

 (?. Upper tail-coverts dusky, like rest of plumage. 

 d}. "Wing more than 9.50. 



e^ 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- 

 L60, middle toe, with claw, 2.20-2.40. Hah. Southern 

 Atlantic, and Antarctic Ocean in vicinity of Kerguelen 

 Island. 



IE. atlantica (Gottld). Atlantic Petrel.* 

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



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

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

 Hah. South Atlantic (vicinity of Trinidad Island). 



M. trinitatis GiGL. & Salvad. Trinidad Petrel.' 

 p. 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. Hah. Southern oceans. 



JE. brevirostris (Less.). Short-billed Petrel.* 



1 Procellaria jamaicensis Bancroft, Zool. Jour. v. 1828, 81. CEstrelata jamaicensis A. & E. Newton, 

 Handb. Jam. 1881, 117. 



2 Procellaria atlantica Gould, Ann. Mag. N. H. xiii. 1844, 362. 



3 yEstrelata trinitatis Salvad. & GiGL., Ibis, 1869, 65. Salvin, Rowley's Orn. Misc. pt. iv. 1876, 253 

 pi. 32. 



* Procellaria brevirostris Less., TraitS, 1831, 611. CEstrelata brevirostris Saltin, Rowley's Orn. Misc. pt. 



