BIRDS OF NORTH AND MIDDLE AMERICA. 501 



Oeospiza bauri Ridgway, Proc. U. S. Nat. Mus., xvii, no. 1007, Nov. 15, 1894, 

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

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



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

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



GEOSPIZA DUBIA Gould. 

 DUBIOUS GROUND FINCH. 



Similar to G. hanri but decidedh' smaller; similar to G. fortis, but 

 larger, with the bill relatively larger and more turgid. 



Ad%ilt mafe.— Length (skins), about 124.46-134.62; wing, 68.58- 

 76.20.(72.64); tail, 41.40-45.72 (43.94); culmen, 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, 17.78-18.64 (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, 16.24-16.00 (15.62).'' 



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



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

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

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

 Brit. Mus., xii, 1888, p. 9 (Chatham I.).— Ridgway, Proc. TJ. S. Nat. Mus., 

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



O.\_eospiza'\ dubia Bonaparte, Consp. Av., i, 1850, 543. 



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



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

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



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

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



Geospiza nebulosa (not of Gould) Sundbvall, Proc. Zool. Soc. Lond., 1871, 125, 

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

 (Chatham I. ). — Shaepe, 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 been seen by me. 



