66 NORTH AMEJilCAy BIRDS. 



Top of head, and upper parts generally-, except <ippcr tail-eoverts, 

 uniform dusky, the back and scapulars paler, with perceptibly 

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

 basal half (approximately) of tail, bead 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. JIah. Middle Atlantic, strag- 

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

 and Europe.... 98. .ffi. hasitata (Kihl). Black-capped Petrel 

 b^. Plumage of lower parts chiefly or entirely dusk\-. 



c*. Upper tail-coverts pale smoke-gray or graJ•it^h white, in marked 

 contrast. 



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

 rather paler and graj-er 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. Hah. Jamaica and adjacent portions of Carib- 

 bean Sea. 



.£. 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 vcr}- dark sooty slate, the feathers white 

 beneath the surface ; wing 10.75-12.00, tail 4.50-5.00 

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

 l.GO, middle toe, with claw, 2.20-2.40. Hah. Southern 

 Atlantic, and Antarctic Ocean in vicinity of Kerguelen 

 Island. 



M. atlantica (GorLn). Atlantic Petrel.' 

 e*. 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. 

 Hah. South Atlantic (vicinity of Trinidad Island). 



JE.. trinitatis Oiot.. & Salvad. Trinidad Petrel.' 

 p. Smaller (wing less than 11.00) ; wing 9.G8-10.20, 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. 



M. brevirostris (Le.ss.). Short-billed Petrel.* 



' Proccllaria jnmnicentiii Banchoft, ZooI. Jour. v. 1S28, 81. (Ealrclata jnmahcmlH A. A E. Newton, 

 Han.lb. .Tarn. 1S81, 117. 



5 Prnrcllaria ntlnntica Gould, Ann. Mag. N. H. xiii. 1844, .^102. 



> ^ulrelala Irinilalit Salvad. 4 GiCL., Ibis, 1869, 65. Salvis, Rowley's Orn. Misc. pt. iv. lS7fi, 253 

 pi. 32. 



♦ Proccllaria hrevirottrit Less., Traitfi, 1831, Oil. (Etlrelata bmirottria Salvin, Rowley's Orn. Misc. pt. 



