BIRDS 



329 



The bill of this form is shaped much like that of Geospiza strenua, 

 being the longest of all the G. fortis bills except G. f. bauri, and 

 has a strongly curved culmen. 



All of the specimens of G. fortis that we obtained on Chatham be- 

 long to this variety, although G. f. fortis is recorded from Chatham 

 by Rothschild and Hartert. We have four adult males, one adult 

 female and two immature males taken in May. The immature males 

 are in Stage IV ; each is moulting slightly. 



MEASUREMENTS OF ADULT SPECIMENS OF GeOSptZd fortis dubtd. 



63*. GEOSPIZA FORTIS SIMILLIMA (Rothschild and Hartert). 



Geospiza dubia simillima ROTHSCHILD AND HARTERT, Novit. Zool., vi, p. 161, 



1899 (Charles Island). 

 Geospiza simillima RIDGWAY, Bull. U. S. Nat. Mus., No. 50, Pt. i, p. 502, 



1901. 



Range. Charles Island. 



This form is described by Rothschild and Hartert from one adult 

 male and four immature birds as differing from G. f. fortis of Albe- 

 marle (comparisons probably made with specimens from Villa Mil at 

 the southeast part of Albemarle) in having the wing from two to three 

 millimeters longer. If this is a valid species really different from G. 

 f. fortis on Charles, we have one immature male that is probably 

 referable to it. This specimen measures as follows : length 130; wing 

 75 ; tail 49; culmen 20; gonys 10; basal width ojf bill 11, basal depth 

 of bill 15.5 ; maxilla from nostril 13 ; tarsus 22. It was taken in May 

 and is moulting. 



637. GEOSPIZA FORTIS BAURI (Ridgway). 



Geospiza bauri RIDGWAY, Proc. U. S. Nat. Mus., xvn, p. 362, 1894 (James 

 Island), and xix, p. 518, 1896 ; Bull. U. S. Nat. Mus., 50, Pt. I, p. 500, 

 1901. 



Geospiza dubia bauri ROTHSCHILD AND HARTERT, Novit. Zool., vi, p. 161, 

 1899. 



