68 NORTH AMERICAN BIRDS. 



mottled and vermiculated with asli-graj- and white, but 

 the former prevailing; lower breast, belly, sides, and 

 flanks smoky plumbeous superficially, but the feathers all 

 pure white immediately beneath the surface; wing 10.15, 

 tail 4 (graduated for .90), culmen 1.00, tarsus 1.25, middle 

 toe, with claw, 1.70. Hab. North Pacific, iu vicinity of 

 Alaska (Kadiak). 



100. JE. fisheri Ridqw. Fisher's Petrel. 

 c'. Back plumbeous or phimbeous-blaek, the feathers bordered with graj-- 

 ish, or whitish, producing a scaled appearance. 

 (P. Above plumbeous-black, the leathers of back and scapulars mar- 

 gined with graj-; hind-neck white, with tips of the feathers 

 pale gray; forehead and lower parts white; wing 11.50, tail 

 5.00, tarsus 1.40, middle toe, with claw, 1.90. ILtb. Eastern 

 South Pacific (island of Masafuera^ 



ifE. externa .S.\LV. Salvin's Petrel.' 

 d^. Above, including whole top of head, dark bluish gray, the feathers 

 of back and scapulars broadly bordered terminallj' with ashy 

 white, the middle and greater wing-coverts similarly marked ; 

 chin, throat, chest, centre of breast, and under tail-coverts plain 

 white ; rest of lower parts vermiculated and irregularly barred 

 with slate-graj' or plumbeous, this becoming uniform and some- 

 what darker on belh- ; tail chiefly plain light brownish graj" ; 

 wing 9.88, tail 3.95, culmen 1.0,3. depth of bill at base .46, tarsus 

 1.37, middle toe, with claw, 1.70. Hab. Unknown; the single 

 specimen obtained having been taken in Livingston Co., New 

 York, in April, 1880. 



99. JE. scalaris Brewst. Sealed Petrel.' 

 i'. Wing not more than 9.00. 



Above ash-gray or plumbeous, changing to white on forehead and 

 over eyes; outer surface of wings uniform; lower parts entirely 

 white, except sides of breast, which are ash-gra}^, like hind-neck; 

 outermost rectriees entirely white ; wing 8.70-9.00, tail 3.80—1.00 

 (graduated for about .90-1.00), culmen 1.04-1.12, tarsus 1.07-1.20, 

 middle toe, with cluw, 1.40. JLib. Eastern South Pacific. 



JE. defilippiana GiOL. & Salvad. De Filippi's Petrel.' 



1 (Ffiri^'nta cxifrnn Sai.v., Ibis, July, 1875, SM. 



' (= "yH. gulnrh" of the A. 0. U. Check List, but not Proccllciria gnlarh Peale.) ./Estrclala scalarit 

 Brewst., Au1«, iii. July, 13S6, 390. 



' /Eilrclnin defiUpjtinna GlOL. & Salvad., Ibis, 1S69, 63. 



