BIRDS OP NORTH AND MIDDLE AMERICA. 



547 



Adult male.— Vimg, 261.5-273 (268.1); tail, 139-148 (144); 

 exposed culmen, 41-44.5 (43.4); tarsus, 23.5-25.5 (24.4); middle toe,. 

 31-32.5 (31.5).« 



Adult female.— Wing, 259-266 (263.3); tail, 137.5-140 (138.2); 

 exposed culmen, 39.5-42 (40.5); tarsus, 23-24.5 (23.6); middle toe, 

 29-31 (30).^ 



Atlantic Ocean, chiefly on iVjnerican side, from Florida Keys, 

 Bahamas, and coast of Louisiana (whore resident), southward through 

 West Indies and along Gulf and Caribbean coasts of Mexico and 

 Central iVmerica to islands of Trinidad and Los Ilermanos, coast of 

 Brazil, St, Paul Rocks, mid-Atlantic, Fernando Noronha, and south 

 Trini(hid, off Brazil, and St. Helena, Ascension, and Tristan da 

 Cunha and Inaccessible islands, off southern Africa; breeding through- 



a Eight specimens. 



^ Five specimens. 



Locality. 



Wing. 



Tail. 



Ex- 

 posed 



cul- 

 men. 



Tarsus, 



iMiddle 

 toe. 



MALES. 



Oneiviult male from I'.ahamas 



Four ail ult males from Porto Rico 



One adult male from Grenada 



One adult male from Atlantic Ocean 



One adult male from Tepic (Isabella Island) (A . s. ridgwaiji). . 



lour adult males from coast of Guerrero {A . s. ridgwayi) 



Two adult males from CLipperton Island (^-1 . s. ridgwayi) 



Two adult males from Cocos Island {A . s. ridgwnyi) 



Seventeen adult males from Galapagos Islands (.4. «. gjlapa- 



gensis) ". 



One adult male from Guam, Pacific Ocean (A . s. unkolor'i) . . . 

 One adult male from Raraka Island, Pacific Ocean {A . s. uni- 



color?) 



Three a<!ult males from islands near Madagascar (-4 . s. rousseaui) 



One adult male from Straits of Malacca (.4. s. pileatusl) 



One adult male from southern China Sea (.4 . «. pilcjtus) 



FEMALES. 



One adult female from Tortugas, Florida 



Four adult females from Porto Rico 



One adult female from Hritish Honduras 



Eight adult females from Tepic (Isabella Island) (A. s. ridg- 



wnyi) 



Four adult females from coast of G uerrero (A . s. ridgwayi) 



Six adult females from Clippcrton Island (.4 . s. ridgwayi) 



Eight adult females from Galapagos Islands (-4 . s. gnhpagensis) 



One adult female from Laysan Island (.4 . s. unicolor?) 



One adult (emale from Guam, Pacific Ocean (.4 . s. unicolorl). 



One adult female from Seychelles (A . s. rousseaui) 



Two adult females from southern China Sea (A . s. piletlus).. . 



265 



270.2 



289 



261.5 



261.5 



266.2 



274.5 



289 



270 

 283 



284. 5 

 277.7 

 275 

 265 



261. 5 

 263.7 

 272 



274.6 



272.5 



270 



265.2 



277 



278 



244 



270 



139 



143.7 



146 



148 



149.5 



147.7 



161.5 



165.5 



151.3 

 167 



167.5 

 151 

 154 

 169 



136 



121.7 



151 



151.1 



147 



153.8 



144.7 



166 



164.5 



144 



150 



41.5 



44.1 



44.5 



41 



41 



42.9 



4n.5 



41.7 



39.8 

 40 



44.5 

 42.8 

 40 

 38 



40 



40.6 



43.5 



41.6 



41.1 



39.6 



38.9 



40 



39 



41 



37.7 



24 



24.3 



25 



25.5 

 24.2 

 24.5 

 25 



22.9 

 26 



26 



24.8 

 23.5 

 25.5 



23.6 

 24 



24.4 



24 



24.1 



22.6 



24 



23 



23 



24.5 



31 



31.5 



32 



30 



30.6 

 32.2 

 32.5 



30.8 

 33.5 



33 



31.2 

 30.5 

 31.5 



30 

 31 



30.7 



30.7 



31.2 



30 



30 



30 



31 



31.2 



