502 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



QEOSPIZA ALBEMARLEI Ridgway. 

 ALBEMARLE GKOUND FINCH. 



Similar to G. dvbia but bill averaging smaller, with the culmen 

 slightly more arched/ 



Ad/dt Tnale.—Yfm^, 71.63-72.90 (72.14); tail, 43.69-45.21 (44.45); 

 culmen, 16.51-17.78 (17.27); depth of bill at base, 12.19-13.97 (13.21); 

 gonys, 8.89-9.40 (9.14); width of mandible at base, 9.91-10.41 (10.16); 

 tarsus, 22.10-22.86 (22.35); middle toe, 15.49-16.00 (15.75).' 



Achat fmude.— Wmg, 71.12-73.66 (72.14); tail, 43.18-43.69 (43.43); 

 culmen, 18.03-19.56 (18.80); depth of bill at base, 13.21-14.48 (13.72); 

 gonys, 9.65-10.16 (9.91); width of mandible at base, 10.16-10.67 (10.41); 

 tarsus, 22.61-22.86 (22.73); middle toe, 16.00-16.76 (16.51).' 



Galapagos Archipelago (Albemarle * and Narborough islands). 



Gcospiza a?6cHtar?ci Ridgway, Proc. U. S. Nat. Mus., xvii, no. 1007, Nov. 15, 1894, 



362 (Tagus Cove, Albemarle I., Galapagos; U. S. Nat. Mus.); xix, 1897, 523, 



footnote. 

 Geospiza dubia albemarlei Rothschild and Hakteet, Novit. Zool., vi, Aug., 1899, 



160, pi. 6, fig. 23 (Albemarle and Narborough islands; crit). 

 Geospiza fortix (not of Gould) Ridgway, Proc. U. S. Nat. Mug., xix, 1897, 521, part, 



pi. 57, fig. 14 (Albemarle I.). 



GEOSPIZA SIMILLIMA Rothschild and Hartert. 

 SIMILAR GROTJNI) FINCH. 



Similar to G. albemarlei, but wing 2-3 mm. longer. 



Geospiza dubia simillima Rothschild and Haktert, Novit. Zool., vi, Aug., 1899, 161 

 (Charles I., Galapagos; coll. Tring Mus.). 



GEOSPIZA FORTIS Gould. 

 STURDY GROUND FINCH. 



Similar to G. dubia but decidedly smaller, with culmen much less 

 strongly convex. 



Jfafe.— Length (skins), about 119.38-121.92; wing, 66.04-74.93 

 (71.12); tail, 40.64^6.23 (43.18); culmen, 16.00-18.54 (17.27); gonys, 

 8.64-10.16 (9.14); depth of bill at base, 11.43-13.46 (12.95); width of 

 mandible at base, 9.40-10.92 (10.16); tarsus, 20.57-22.35 (21.59); mid- 

 dle toe, 14.99-16.51 (15.75).' 



'According to Messrs. Rothschild and Hartert, the wing is generally 2.00-4.00 

 longer in this form than in G. dubia; these gentlemen do not, however, give any 

 measurements, and I am therefore forced to give my own taken from a much smaller 

 series of specimens. 



' Two specimens. ^ Three specimens. 



■> Another form from Albemarle Island has recently been described. ( Geospiza 

 fortis platyrhyncha Heller and Snodgrass, Condor, iii, May, 1901, 75; type from 

 Iguana Cove, Albemarle Island, in Leland Stanford Jr. University collection.) 



^ Eighteen specimens. 



