( IM ) 



depression on the culmen in front of the nostril, but not so well marked as in 

 G. (iifficilis. In size of the bill G. debilirostris apjjroaches (J. Jot tits, but tlie bill is 

 smaller and not so high. The culmen of adnlt males measures lii mm.; greatest 

 height of bill near base, 9-fi — 10 mm.: wing, 71 — 73 mm.; the tar.sns, 'M mm.; 

 middle toe without claw, lo mm. 



21. Geospiza scandens scandens (Oonld). 



Cactornh xcandom, Gould in Prar. Zoul. Soc. Lonih 1887, p. 7 ; Zmil. Voi/. lieaglc, III. Birds, p. 104, 

 PI. XLII. ; SaU-in in Tram. Zool. So,: Loml. IX. p. 485 (1876) ; Sharpe, Cut. B. Rrit. Mu». 

 XII. p. 19. 



Geospiza scandens, Ridgway in Proc. U.S. Nat. .Mus. XIX. p. 534. 



G. scandens scandens is only known from James Island, but G. scandens 

 intermedia and G. scandens fatignta are so closely allied that it is very difficult to 

 separate tliem. Young specimens of these subsj)ecies are not always separable. 

 Adult black tmdea with black bills of G. scandens scandens: culmen, 18 — Is-o mm.; 

 wing, 70 — 72 mm. 



22. Geospiza scandens intermedia Ridgw. 



Geospjza intermedia, Ridgway iu Proc. U.S. -Xnt. J/«s. XVII. p. 3tU ; Ridgway oji.cil. XIX. p. 535. 

 (?) Cactoniis assimilis, Gould in Proc. Zool. Soc. Loml. 1837, p. 7 ; Voi/. Beagle, III. Birds, p. 105, 

 PI. XLIII. 



The form from Charles Island differs from typical G. scandens in having the 

 bill slightly larger. The culmen of adult males measures 19— 21-5 mm.; the wing, 

 70 — 75 mm. We have it also from Gardner. 



Cactornis assimilis of Gould certainly did not come from Bindloe Island, 

 because Darwin had evidently not collected there at all. Consequently the Bindloe 

 form cannot be called assimilis. The type of assimilis, an immature bird, came 

 most probably from Charles Island ; the name is therefore best placed provisionally 

 as a synonym of G. scandens ititermedia. 



23. Geospiza scandens fatigata Ridgw. 



Geospim fnliyatf, Ridgway in Proc. U.S. Nat. J/h.5. XVIII. p. 293 ; Ridgway in Proc. U.S. Nal. 



Mus' XIX. p. 539. 

 Geospiza harriiiijtoni, Ridgway in Proc. U.S. Nat. .Uns. XVII. p. 361 ; Ridgway in Proc. U.S. Nat. 



.UiM. XIX. p. 541. 



This form is very closely allied to G. scandens intermedia, but the bill and 

 wing is generally slightly larger, and the tarsus 1 or 2 mm. longer, while the feet 

 apjjear stronger and clumsier. We are not able to detect the slightest difference 

 between specimens from Indefatigable and Harrington Islands, thougii we have the 

 type of " G. barriugtoni " and two dozen other specimens from Barringtou to 

 compare. 



We have G. scandens faligata from Indefatigable, Duncan, Albemarle, Jervis, 

 Chatham, and Barringtou Islands. The number of black «w/c,>( is everywhere rather 

 small, and generally we find a much larger proportion of adult black-billed black- 

 plumaged males among the few specimens of Dr. Baur's collection than among the 

 large series collected by the Harris expedition. 



Our mules from Indefatigable Island measure : culmen, 19, 20, 20-5, 21, 22, 

 22'6 mm.; wing, 7u — 76 mm. 



