68 NORTH AMERICAN BIRDS. 



mottled and vermiculated with ash-gray 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. Sab. North Pacific, in vicinity of 

 Alaska (Kadiak). 



100. M. fisheri Eidgw. Fisher's Petrel. 

 c 2 . Back plumbeous or plumbeous-black, the feathers bordered with gray- 

 ish, or whitish, producing a scaled appearance. 

 d 1 . Above plumbeous-black, the feathers of back and scapulars mar- 

 gined with gray ; 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. Sab. Eastern 

 South Pacific (island of Masafue^ 



2E. externa Salv. Salvin's Petrel. 1 

 d 2 . Above, including whole top of head, dark bluish gray, the feathers 

 of back and scapulars broadly bordered terminally 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-gray or plumbeous, this becoming uniform and some- 

 what darker on belly; tail chiefly plain light brownish gray; 

 wing 9.88, tail 3.95, culmen 1.03, depth of bill at base .46, tarsus 

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

 specimen obtained having been taken in Livingston Co., New 

 York, in April, 1880. 



99. M. scalaris Brewst. Scaled Petrel. 2 

 b 2 . Wing not more than 9.00. 



Above slate-gray or plumbeous, becoming more ashy anteriorly, this 

 changing to white on forehead and over eyes; outer surface of 

 wings uniform ; lower parts entirely white, except sides of breast, 

 which are ash-gray, like hind-neck ; wing 8.70-9.00, tail 3.80-4.00 

 (graduated for about 1.00), culmen 1.04-1.05, tarsus 1.07-1.12, middle 

 toe, with claw, 1.40. Sab. Eastern South Pacific. 



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



1 QSstrelata externa Salt., Ibis, July, 1875, 373. 



2 (= "JE. gularie " of the A. 0. U. Check List, but not Procellaria gularis Peale.) JSatrelata scalaris 

 Brewst., Auk, Hi. July, 1866, 300. 



3 JEstnlata defilippiana GriOL. & Saltad., Ibis, 1869, 63. 



