8 FRINGILLID^. 



quills below dusky brown, asby wbite along tbe inner edge. Total 

 lengtb 6 inches, culmen 1, wing 3-35, tail 2, tarsus 1. 



None of the seven specimens in the Museum have the sexes or 

 dates of capture marked, but the brown birds, which I take to be all 

 females, have shorter wings than the black males. Tn the latter 

 the length of wing is 3-55-3-7 inches, and in the females 3-25-3-45. 

 The bill in the females varies in colour, probably with season, 

 becoming much blacker, and the increase in colour of the bill is 

 accompauied by a blacker tone of plumage, the upper surface having 

 the ashy margins less pronounced, while the under surface of the 

 body is thickly mottled with black spots. 



Mr. Salvin has " little doubt that a large series of the skins of this 

 bird would show that the dimensions of the species graduate into 

 those of G. stroma." 



Hah. Chatham and Charles Islands, Galapagos. 



a, b. 3 J ad. sk. Chatham Island (C Zoological Society [P.]. 



Darwin). (Types of species.) 



c, d. Jad. sk. Galapagos (C. Bar- Sal vin-Godman Coll. 



ic in), 

 e- 6 ; f, ( J- 2 a( h s k. Galapagos. Sir W. Burnett and 



Admiral Fitzroy [P.]. 



2. Geospiza strenua. 



Geospiza strenua, Gould, P. Z. S. 1837, p. 5; Darwin, Zool. Voy. 

 'Beagle? Birds, p. 100, pi. xxxvii. (1841); Gray, Gen. B. ii. p. 859 

 (1844) ; Bp. Consp. i. p. 542 (1850) ; Sel. $ Salv. P. Z. S. 1870, 

 p. 823; Gray, Hand-l. B. ii. p. 88, no. 7298 (1870) ; Sundev. 

 P. Z. S. 1871, p. 124; Scl # Salv. Nomencl. Av. Neotr. p. 27 

 (1873) ; Salv. Trans. Z. S. ix. p. 480 (1870). 



Adult male (type of species). Similar to G. magnirostns, but 

 smaller : "bill brown or black or yellowish brown; tarsus black or 

 grey, the underpart of the foot light brown or light grey ; iris brown 

 or dark brown " (Dr. A. Habel). Total length 5-75 inches, culmen 

 0-85, wing 3-15, tail 1-9, tarsus 1. 



An adult male from Indefatigable Island has the wing 3-05 inches, 

 tarsus 0-95. 



Adult males from A bingdon Island measure : — Wing 3-2-3-3 inches, 

 tarsus 0-95-1. 



Adult males from Bindloe Island measure : — Wing 3-2-3-3 inches, 

 tarsus 0-9-1. 



Adult female. Differs from the female of G. magnirostris only in 

 size. Total length 4-7 inches, culmen 0-8, wing 2-9, tail 1-7, 

 tarsus 0-9. 



The female bird from Abingdon Island has the wing 3-1 inches 

 and the tarsus 1 . Those from Bindloe Island measure : — Wing 

 2-9-3-2 inches, tarsus 0-9-0-95. 



Immature males resemble the old females, but have rather darker 

 mottling of the black centres to the throat- and breast-feathers and 

 have the bill yellowish below (in skin). 



