496 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



92.33;^ tail, 50.80;" culnien, 26.50-27.00 (2(1. 80); depth of bill at base, 

 23.50-24.00 (23.70);^ tarsus, 25.00.^ 



Immature male. — Similar to adult male, but the black duller and 

 browner, "the feathers having edges of obscure brown;'' the feathers 

 of abdomen more distinctly edged with a paler hue ; ' • under tail-coverts 

 white, with black bases. '"^ 



Adult female. — General color ])rown, the feathers edged with olive- 

 gra3nsh, especially on rump and upper tail-coverts; wing-coverts mar- 

 gined with pale grayish, these edgings approaching white on greater 

 coverts; alula, primar}^ coverts, and remiges edged with pale grayish, 

 these edgings approaching brownish white on primaries; tail lighter 

 brown; rectrices edged with brownish gray; under parts, except 

 throat, pale brown or brownish white; the foreneck, chest, sides, and 

 tianks streaked with dark brown; thighs, under tail-coverts, under 

 wing-coverts, and axillars whitish olive-brown; bill dusky or partly 

 of paler hue; wing, 82.55-87.63.'^ 



Galapagos Archipelago, probably extinct; particular island unknown, 

 but supposed to be Charles Island.* 



The only known specimens of this species are in the collection of the 

 British Museum, and I have therefore been obliged to take the above 

 specific characters from the descriptions of Dr. Sharpe and Messrs. 

 Rothschild and Hartert. 



Geospiza magnirostris Gould, Proc. Zool. Soc. Lond., pt. v, 1837, 5 (Galapagos 

 Islands; coll. Brit. Mus.);^ Zool. Voy. Beagle, iii, Birds, 1841, 100, pi. 36 

 (Charles and Chatham islands).— Salvin, Trans. Zool. Soc. Lond., ix, pt. ix, 

 1876, 478 (fig. of 1)ill).— Sharpe, Cat. Birds Brit. Mus., xii, 1888, 7 (Chatham 

 and Charles islands).— Ridgway, Proc. U. S. Nat. Mus., xix, 1897, 512, pi. 

 57, fig. 10 (nionogr.). — Rothschild and Hartert, Novit. Zool., vi, 1899, 154 

 (crit. ; probably extinct). 



G.leosjnza] magnirostris Bo-s^apaute, Consp. Av., i, 1850, 542. 



[Geospiza'] magnirostris Gray, Hand-list, ii, 1870, 88, no. 7297. — Sclater and 

 Salvin, Nom. Av. Neotr., 1873, 27. 



G.\_eospiza^ magnirostris magrm-ostris Rothschild and Hartert, Novit. Zool., vi, 

 Aug., 1899, 155, in text. 



GEOSPIZA STRENUA Gould. 

 GOULD'S GROUND FINCH. 



Similar to G. magnirostris but smaller (culmen rarely 25.40, never 

 more, averaging 22.86; depth of bill at base less than 22.86, averaging 



20.83). 



^Rothschild and Hartert. 



'■^Sharpe. 



* Measurements from Sharpe (converted from inches into millimeters). 



'Rothschild and Hartert, Novit. Zool., vi, 1899, 154, 155. 



^According to Sharpe, the types are from Chatham Island, but Messrs. Rothschild 

 and Hartert are of opinion that they came from Charles Island, a view in which I 

 concur. 



