504 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



GEOSPIZA FRATERCULA Ridgway. 

 LESSER GROITNI) FINOH. 



Similar to G. forfin but smaller, with narrower bill and more con- 

 vex culmen. 



Jfefe.— Length (skins), about 118.11-120.65; wing, 64.26-67.31 

 (65.79); tail, 38.61-43.18 (41.15); culmen, 16.51-17.27 (17.02); gonys, 

 9.14-9.65 (9.40); depth of bill at base, 11.18-13.21 (12.19); width of 

 mandible at base, 9.14-10.16 (9.65); tarsus, 19.81-20 57 (20.07); mid- 

 dle toe, 13.97-14.99 (14.48).^ 



Galapagos Archipelago (Abingdon and Bindloe islands). 



Geospiza fortis (not of Gould) Salvin, Trans. Zool. Soc. Lond., ix, pt. ix, 1876, 

 p. 481, part (Abingdon I.).— Eidgway, Proc. V. S. Nat. Mus., xii, 1890, 

 p. 107 (Abingdon I.); xix, 1899, 521, part (Bindloe I.). 



Oeospiza fratercula Kidgway, Proc. U. S. Nat. Mus., xvii, no. 1007, Nov. l-i, 1894, 

 363 (Abingdon I., Galapagos Archipelago; collection IT. S. Nat. Mua.); xix, 

 1897, 525, pi. 57, fig. 16 (monogr.). 



Oeospiza fortis fratercula TioT-HSCHihT) and Haktert, Novit. Zool., vi, Aug., 1899, 

 161 (Abingdon and Bindloe islands; crit. ). 



GEOSPIZA FULIGINOSA Gould. 



SOOTY GROUND FINCH. 



Similar to O. fratercula but smaller, especially the bill. 



ifa/tf.— Length (skins), about 101.60-105.41; wing, 59.69-71.12 

 (63.50); tail, 35.56-42.42 (39.12); culmen, 11.94-14.73 (13.21); gonys, 

 6.10-7.62 (6.86); depth of bill at base, 7.87-10.92 (8.64); width of 

 mandible at base, 5.84-7.62 (6.86); tarsus, 18.54-20.83 (19.81): middle 

 toe, 10.92-15.24 (13.72).' 



i^ema^e.— Length (skins), about 101.60-105.41: wing, 58.42-64.01 

 (61.47); tail, 34.80-40.13 (37.85); culmen,, 11.18-13.97 (12.70); gonys,- 

 6.10-7.37 (6.86); depth of bill at base, 7.62-8.89 (8.13); width of man- 



' Seven specimens, the average measurements of specimens from different islands 

 being as follows: 



No females of this form have been examined by me. 

 '-^ Forty-nine specimens. 



