BIEDS — PEOCELLAEINAE — THALASSIDEOMA PELAGICA. 



831 



Oceanites, Keys. & Bias.* 

 THALASSIDROMA WILSONI, Bonaparte. 



Wilson's Stormy Petrel. 



Procellaria pelagica, Wils. Am. Orn. VII, 1808, 90; p'. Ix. 



Procellaria " oceanica, Kuhl, Beitr. Zool. 1820 ; pi- x, f. 1." Gray. 



Tkalassidroma u'ikoni, Bon. Sjn. 1828, No. 308.— Nutt. Man. II, 1834, 324.— AuD. Orn. Biog. Ill, 1835, 486; 



V, 1839, G45.— Ib. Birds Am. VII, 1844, 223 ; pi. cccclx. 

 Oceanites wilsoni, Bon. Cons. Avium, II, 1855, 199. 



Sp. Ch. — The general color of the plumage is dark sooty brown ; primaries and tail blackisli brown, the latter white at the 

 base ; some of the outer secondaries and the secondary coverts grayish ash, ending with grayish white ; rump, sides of tho 

 abdomen and exterior lower tail coverts, white ; bill bl-ick ; iris dark brown ; tarsi and feet black, with the webs yellow except 

 at the margin. • 



Length, Tj inches ; wing, G ; tail, J ; bill, j-'^ ; tarsus, Ij. 



Hab. — OIF the Atlantic coast from tlie Gulf of Mexico to BafEns' Bay. 



This species is somewhat smaller than T. leachii, and more delicate in form, the bill is much 

 weaker ; it may readily he distinguished by the greater proportion of white on the under tail 

 coverts and on the sides at the base of the tail, together with its much longer tarsi and yellow 

 webs ; tail nearly even. ' 



List of specimens. 



Procellaria, Linn. 

 THALASSIDEOMA PELAGICA, Vigors. 

 The Stormy Petrel; Mother Carey's Chicken. 



Procellaria pelagica, Linn. Syst. Nat. I, 1766, 212. — Bon. Consp. Av. II, 1855, 196. 



Tkalassidroma pelagica. Vigors, Zool. Jour. II, 1825, 405.— Bonap. Syn. 1828, Append. Note 97, No. 3. Nutt. 



Man. II, 1834, 327.— Aud. Orn. Biog. IV, 1838, 310.— Ib. Birds Am. VII, 1844, 228 ; 



pi. cccclxi. 

 "Procellaria melanontjx, Nilsson." 

 "Procellaria melilensis, Schembri." 

 " Procellaria tenuirostris, minor, ferroensis, et albifascinta, Brehm." 



Sp. Ch.— Upper plum.jge grayish black, tinged with brown ; quill feathers black; the secondary coverts are margined 

 towards the end, externally, and at the tip, with grayish white ; a band of white crosses the rump ; upper tail coverts white at 

 the base, but broadly ending with black ; tail black with the basal part white for a short distance ; under parts sooty brown ; 

 lower tail coverts white at the base; axillar feathers and some of the under wing coverts white at the end ; bill black ; iris 

 dark brown ; tarsi and feet black. 



Length, 5J inches ; wing, 5 ; tail, 2i ; bill, /rj ; tarsus, I. 



Hab, — Atlantic ocean, banks of Newfoundland. 



' Claws acute. 



