BIRDS OF NORTH AND MIDDLE AMERICA. 507 



The form of the bill in this species is conspicuously unlike that of 

 any other, being almost exactly that of Cardttelis. 



Geospiza acidirostris Ridgway, Proc. U. S. Nat. Mas., xvii, no. 1007, Nov. 15, 

 1894, 363 (Tower I., Galapagos Archipelago; collection of Dr. G. Baur') ; xix, 

 1897, 531, pi. 57, fig. 21 (monogr. ). — Rothschild and Haetert, Novit. Zool., 

 vi, 1899, 162, pi. vi, tig. 39 (crit.). 



GEOSPIZA DENTIROSTRIS Gould. 

 TOOTH-BILLED GROTTNl) FINCH. 



Similar to G. fratei'cula but tail decidedly shorter, bill smaller, and 

 maxillary tomium "'toothed"' in middle or subterminal portion. 



Adult laalt^. — Length (skin), 114.30; wing, 67.31; tail, 3B.83; cul- 

 men, 13.97; tarsus, 19.05.' 



Female {inmiaturef). — Length (skin), 124.46; wing, 67.31; tail, 39.37; 

 culmen, 15.24; tarsus, 19.05.^ 



Galapagos Archipelago (Charles Island; Chatham Island;!). 



Geospizii deidirtMrif. Gould, Proc. Zool. Soc. Lond., pt. v, 1837, 6 ((.jaiapagos 



Islands); Zool. Voy. "Beagle," iii. Birds, 1841, 102.— Salvin, Trans. Zool. 



Soc. Lond., ix, pt. ix, 1876, 482, part (Charles I. ). — Sharpe, Cat. Birds Brit. 



Mus., xii, 1888, 11 (Charles I.; Chatham I.?).— RidcxWay, Proc. U. S. Nat. 



Mus., xix, 1897, 532 (monogr.). — Rothschild and Hartert, Novit. Zool., 



vi, 1899, 163 (Charles I.; crit.). 

 G-l^eospizti] (Zfr(?mj.s/r/.s Bonaparte, Consp. Av., i, 1850, 543. 

 \_Geospiza'\ denfirostris Gray, Hand-list, ii, 1870, 88, no. 7302. — Sclater and 



Salvin, Nom. A v. Neotr., 1873, 27. 

 Geospiza foriis (not of Gould) Salvin, Proc. Zool. Soc. Lond., 1883, 421, part 



(Charles I.). 



GEOSPIZA HARTERTI Ridgway. 

 HARTERT'S GROUND FINCH. 



Similar to fr. denfmMtris but maxilla without any tomial " tooth ;'^ 

 wing, 69.00; culmen, 14.50; from nostril to tip of maxilla, 9.80. 

 Galapagos Archipelago (Chatham Island). 



Geospiza spe<\ inc. Rothschild and Hartert, Novit. Zool., vi, Aug., 1899, 163 

 (Chatham I.). 



GEOSPIZA DIFFICILIS Sharpe. 

 SHARPE' S GROUND FINCH. 



Similar to G. /)digi?iosa in general dimensions, but bill very differ- 

 ent in form, being more elongated; culmen straighter, with basal por- 



'Type now in the Tring Museum. 



^The above measurements, converted from inches to millimeters, are taken from 

 Dr. Sharpe' s description in vol. xii of the "Catalogue of the Birds in the British 

 Museum," pp. 11, 12. Messrs. Rothschild and Hartert give measurements of the 

 same specimens as follows: 



Adxdt male. — Culmen, 14.80; from nostril to tip of maxilla, 9.80. 



Female. — Culmen, 14.70; from nostril to tip of maxilla, 10.80; wing, 68.00. 



