BIRDS OF NORTH AND MIDDLJE AMERICA. 



497 



Adult male.—L&ngth. (skins), about 139.70-147.32; wing, 76.20- 

 87.88 (83.31); tail, 43.69-51.31 (49.53); culmen, 19.05-25.40 (22.86); 

 gonys, 10.92-13.97 (12.45); depth of bill at base, 17.02-22.10 (20.83); 

 width of mandible at base, 12.95-17.02 (15.24); tarsus, 23.11-26.40 

 (24.64); middle toe, 17.7s-19.81 (18.54).' 



Adult female. — Length (skin), 143.51;" wing, 76.20; tail, 48.26; cul- 

 men, 21.08; depth of bill at base, 18.29; width of mandible at base, 

 13.46; tarsus, 23.37; middle toe, 17.02.' 



Galapagos Archipelago (Charles, James, Bindloe, Abingdon, Inde- 

 fatigable, Jervis, Albemarle, Duncan, Barrington, and Wenman 

 islands). 



Geospiza slrenaa Gould, Proc. Zool. Soc. Lond., pt. v, 1837, 5 (Galapagos Islands; 

 coll. Brit. Mus.'); Zool. Voy. "Beagle," ill, 1841, 100, pi. 37 (James and 

 Chatham islands). — Sclatbe and Salvin, Proc. Zool. Soc. Lond., 1870, 323 

 (Indefatigable, Bindloe, and Abingdon islands). — Sundevall, Proc. Zool. 

 Soc. Lond., 1871, 124 (James I. ). — Salvin, Trans. Zool. Soc. Lond., ix, pt. ix, 

 1876, 479 (James, Chatham, Bindloe, and Abingdon islands). — Sharpe, Cat. 

 Birds Brit. Mus., xii, 1888, 88 (Chatham, James, Indefatigable, Abingdon, 

 and Bindloe islands). — ^Ridgway, Proc. U. S. Nat. Mus., xii, 1889, 105 

 (Abingdon and Charles islands); xix, 1897, 514 (monogr. ). — Eothschild 

 and Haeteet, Novit. Zool., vi, 1899, 155, pi. 6, flgs. 1-6, 10-16 (Bindloe, 

 Abingdon, Indefatigable, Tower, Jervis, Albemarle, Duncan, Barrington, 

 and Wenman islands; crit. ). 



G.[eospiza] sirereua Bonaparte, Consp. Av., i, 1850, 542. 



[Geospiza] sirenua Gray, Hand-list, ii, 1870, 88, no. 7298. — Sclatee and Salvin, 

 Nom. Av. Neotr., 1873, 27. 



' The above measurements are of a series of thirty-six males, only six of which 

 were measured by myself, the measurements of the remaining thirty being taken 

 from Messrs. Rothschild and Hartert. The measurements of tail, tarsus, and middle 

 toe are from six specimens only, these measurements having been omitted by Messrs. 

 Rothschild and Hartert. 



The average measurements of males from different islands are as follows: 



' One specimen, from Abingdon Island. 



' The type in the British Museum collection is said by Sharpe to be from Chatham 

 Island, but probably came from James Island. (Rothschild and Hartert, Novit. 

 Zool., vi, 1899, 155). 



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