OF THE GALAPAGOS ARCHIPELAGO. 483 
this term in the series makes Geospiza fortis well defined, so far as these two islands 
are concerned, from G. parvula. But then we find G. strenua, the next larger in point 
of size to G. fortis; so that no rule can be traced showing that in each island the 
Geospize are well defined by the omission of some one or more intermediate species 
to be sought for in some other island. 
Of this bird Dr. Habel says, “‘ The members of this species, like the rest of the mem- 
bers of the genus Geospiza, associate in small flocks. Although seeds and other vegetable 
substances form their chief food, they resort at low tide to the sea-shore in search of 
sustenance.”—H. 
GEOSPIZA PARYULA. 
Geospiza parvula, Gould, P. Z.S. 1837, p. 6; Darwin, Zool. Vog. Beagle, iii. p. 102, t. xxxix. ; 
Sel. & Salv. P. Z. S. 1870, p. 323; Sundevall, P. Z. S. 1871, p. 125. 
Species quoad colores G. strenue similis, sed totius generis minima. 
Hab. James Island (Darwin); Chatham Island (Swndevall); Bindloe and Abingdon 
Islands (Habel). 
Considerable variation is shown in the size of individuals of this species, as will be 
seen from the following table :— 
Wing varies from. . . . 2°15 inches to 2°40 inches, or 0°25 inch. 
Tail varies from . . . . 1:30inch to1‘50inch, or 0:20 inch. 
Tarsus varies from . . . 0'63inch to0°72 inch, or 0:09 inch. 
the variations in the bill being, as in the former cases, shown by the woodcuts :— 
oa 
Geospiza parvula 3 Geospiza parvula 2 
(Bindloe Island). (Bindloe Island), 
“In habits this species resembles the foregoing, with which it consorts.”—H. 
GEOSPIZA DENTIROSTRIS. 
Geospiza dentirostris, Gould, P. Z.S. 1837, p.6; Darwin, Zool. Voy. Beagle, iii. p. 102; Sel. & Salv. 
P. Z.8. 1870, p. 323. 
3 niger, crisso stricte albo marginato: rostro nigro, maxilla dentata: pedibus obscure 
corylinis: long. tota 4:5, ale 2°4, caudee 1:4, tarsi 0°8. 
2 fusco-nigra, subtus pallido fusco variegata: long. tota 4'3, alz 2°35, caude 1:35, 
tarsi 0°8. 
Hab. Galapagos (Darwin); Abingdon Island (Habel). 
Dr. Habel obtained five specimens of this species in Abingdon Island, of which four 
are marked males and one female. One only of the males is in the black dress of the 
