^STRELATA. 67 



d}. Wing less than 9.50. 



Plumage sooty blackish ; wing 9.15, tail 3.82 (graduated for 

 about .44), culmen 1.10, tarsus 1.46, middle toe, with claw, 

 1.55. Hab. West coast of Africa; vicinity of Bourbon 

 Island. 



/E. aterrinia (Schleg.), Black Petrel.^ 

 o?. Inner webs of primaries abruptly white for at least the inner half 

 b^. Wing more than 9.00. 



c'. Back uniform grayish, brownish, or dusky. 

 d}. Top of head, back, etc., plain dusky. 



e^. Shafts of quills whitish ; head, neck, and upper parts plain 

 dark brownish gray, paler (nearly white) on throat and 

 fore-neck ; breast, flanks, and under tail-coverts brownish 

 gray; rest of lower parts sometimes white, sometimes 

 entirely dusky; wing 11.19-11.64, tail 3.91-4.17, culmen 

 1.20. Hab. South Pacific, from Sunday Island to Juan 

 Fernandez. 



2E. neglecta (Schleg.), Neglected Petrel.* 

 &. Shafts of quills dark brown ; head, neck, and upper parts plain 

 dark slaty (feathers of head and neck white beneath sur- 

 face, those of back, etc., white at base) ; upper tail-coverts 

 and tail brownish ash-gray ; lores, chin, throat, and under 

 tail-coverts white, the first mixed with blackish ; breast, 

 belly, sides, and flanks plain brownish plumbeous, the 

 feathers pure white immediately beneath surface ; thighs 

 and chest white irregularl}^ barred or vei^miculated with 

 deep grayish ; wing 10.00, tail 4.00 (graduated for .90) 

 culmen 1.02, depth of bill at base .50, tarsus 1.20, middle 

 toe, with claw, 1.55. Hab. Antarctic Ocean. 



IE. gularis (Peale), Peale's Petrel.^ 

 d^ Top of head white, spotted with grayish. 



Back and scapulars fine bluish gray, or plumbeous ; lesser 

 wing-coverts slaty blackish ; greater and middle coverts 

 slate-gray, broadly margined with white; tail mostly 

 white, irregularly barred and vermiculated with gray; 

 lores, cheeks, chin, throat, middle of chest, and under tail- 

 coverts immaculate pure white ; a blackish spot imme- 

 diately beneath eye ; sides of neck and chest densely 



V. 1876, 235 (in text). uEstrelata grisea Coues, Pr. Ac. Nat. Sci. Phila. 1866, 148 (ex Procellaria grisea Kuhl, 

 nee Lath.). CEstrelata kidderi Coxjes, Bull. U. S. Nat. Mus. No. 2, 1875, 28 (Kerguelen Island). 



1 Procellaria aterrima " Verreaux," Schleg. Mus. P.-B., Procellarix, 1863, 9. ^atrelata aterrima 

 CocES, Pr. Ac. Nat. Sci. Phil. 1866, 158. 



2 Procellaria neglecta ScHLEG., Mus. P.-B., Procellarise, 1863, 10. ^8trelata neglecta CouES, Proc. Ac. 

 Nat. Sci. Phil. 1866, 147. 



' Procellaria gulnris Peale, Zool. U. S. Expl. Exp. 1848, 299. CEstrelata gularis Brewst., Bull. Nutt. 

 Orn. Club, iv. 1881, 94 (part). 



