BIRDS OF NORTH AND MIDDLE AMERICA. 501 



Geospiza baui-i Ridgway, Proc. U. S. Nat. Miis., xvii, no. 1007, Nov. l.'i, 1894, 

 362 (James J., Galapagos Archipelago; collection of Dr. G. Baur);' xix, 

 1897, 518, pi. 57, fig. 12 (monogr.). 



Geospiza dubia bauri Rothschild and Hartekt, Novit. Zool., vi, Aug., 1899, 161, 

 pi. 6, fig. 24 (crit.). 



GEOSPIZA DUBIA Gould. 

 DUBIOUS GROUND FINCH. 



Similar to G. haari l)ut decided!}' smaller: similar to G. fortis, but 

 larger, with the bill relatively larger and more turgid. 



Adult male. — Length (skins), about 124.46-134.62; wing, 68.58- 

 76.20 (72.64); tail. 41.40-45.72 (43.94); oulmen, 16.51-19.05 (18.03); 

 gonys, 8.38-10.16 (9.65); depth of bill at base, 13.21-15.49 (14.22); 

 width of mandible at base, 9.91-12.45 (10.92); tarsus, 21.59-23.11 

 (22.61); middle toe, 14.99-17.78 (16.00).' 



Adult female. — Length (skin), about 114.30; wing (one specimen), 

 '71.12; tail (one specimen), 43.69; culmen, 17.78-18.54 (18.29); gonys, 

 9.40-9.91 (9.65); depth of bill at base, 13.46-14.99 (14.22); width' of 

 mandible at base, 10.41-10.67(10.54); tarsus, 21.59-22.35(21.97); mid- 

 dle toe, 15.24-16.00 (15.62). •' 



Galapagos Archipelago (Chatham, Barrington, and Duncan islands).* 



Geospiza dubia Gould, Proc. Zool. Soc. Lond., pt. v, 1837, 6 (Galajjagos Islands): 

 Zool. Voy. "Beagle," iii. Birds, 1841, p. 103 (Chatham I.).— Salvin, Trans. 

 Zool. Soc. Lond., ix, pt. ix, 1876, p. 480 (Chatham I.). — Sharpe, Cat. Birds 

 Brit. Mus., :^ii, 1888, p. 9 (Chatham I.).— Ridgway, Proc. U. S. Nat. Mas., 

 xix, 1897,519, pi. 57, fig. 11 (monogr.). 



G-leospiza] dubia Bonaparte, Consp. Av., i, 1850, 543. 



[Geospiza"] dubia Gray, Hand-list, ii, 1870, 88, no. 7304. 



Geospiza dubia dubia Rothschild and Hartert, Novit. Zool., vi, Aug., 1899, 160, 

 pi. 6, fig. 22 (Chatham, Barrington, and Duncan islands). 



Geospiza fortis (part) Gould, Zool. Voy. "Beagle," iii, Birds, 1841, 101 (Chat- 

 ham I.).— Ridgway, Proc. U. S. Nat. Mus., xii, 1889, 107 (Chatham I.). 



Geospiza nehnlosa (not of Gould) Sundevall, Proc. Zool. Soc. Lond., 1871, 125, 

 part (Chatham I.).— Salvix, Trans. Zool. Soc. Lond., ix, pt. ix, 1876, 482 

 (Chatham I.).— Sharpe, Cat. Birds Brit. Mus., xii, 1888, 11, part. 



^ Now in the Tring Museum collection. 



- Ten specimens. 

 ^ Two specimens. 

 * Specimens from Barrington and Duncan islands have not lieen seen by me. 



