538 BIRDS OF THE GALAPAGOS ARCHIPELAGO— RIDGWAY. vol.xix. 



brown, edged Avitli ashy olive. Total length, 5 inches; culmen, 0.9; 

 wing, 2.75; tail, 1.4; tarsus, 0.9."). 



^'•AduH female. — Similar to the male. Total length, 5 inches; cul- 

 men, 0.85; wing, 2.75; tail, 1.5; tarsus, 0.85." (Sharpe.) 



Without having seen specimens of this form, I am uiuible to state 

 just how much it diflers from G. intermedia and other local races. 



Upon what grounds Messrs. Sclater and Salvin, and after them Dr. 

 Sharpe, identify the Bindloe Island Cactornis Avith C. assimilis, Gould, 

 we are not informed. Even Darwin did not know where the type came 

 from, though he says "almost certainly not from James Island."^ 



There is in Dr. Baur's collection a young male from James Island (No. 

 527, August 13, 1891) which is certainly not G. ficandens, but is either 

 G. assimilis or an undescribed form. It is decidedly larger than any of 

 the eight examples of G. seandens with which L have compared it, the 

 bill especially being much larger and deeper, with decidedly curved cul- 

 men. These differences are the more important from the fact that the 

 bird is a very young one, in nestling i)lumage. The coloration is much 

 darker than in any of the immature stages of G. seandens^ the under 

 X^arts being mostly dark sooty grayish distinctly intermixed with whit- 

 ish only on the abdominal region and under tail-coverts, and the upper 

 parts are quite uniform dark sooty, except the wings, which have the 

 usual lighter margins, though these are distinct only on the middle and 

 greater coverts. The bill is a light butty brown, dusky at the extreme 

 tip and deeper brown basally. In coloration this James Island speci- 

 men very closely resembles a young male of corresponding age of G. 

 abim/doni, except that in the latter the maxilla is almost wholly black- 

 ish brown, and the mandibular rami have a sharply defined obli(iue spot 

 of the same color at their upper basal portion; but the shape of the bill 

 is quite difl'erent, that of G. oMngdoni being much more slender. 



The ijresumed young male of G. assimilis^ mentioned above, may be 

 more exactly described as follows: 



Young male. — No. 527, collection of Dr. G. Baur; James Island, Gala- 

 pagos, August 13, 1891. Above uniform sooty blackish, the middle wing- 

 coverts and remiges narrowly margined with dull grayish bufl'y, becom- 

 ing more decidedly grayish on primaries; greater wing-coverts more 

 broadly margined (especially at tips) with a more pronounced buffy 

 tint; under parts more grayish dusky than ui>per surface, nearly uni- 

 form as far back as chest, elsewhere, especially on abdomen, broken by 

 irregular streaks of dull grayish white; bill pale bufly brown, deeper 

 brown on basal half of maxilla (except on culnien) and along detlected 

 l^ortion of the mandibular tomium; legs and feet blackish brown; "iris 

 dark brown." Length (skin), 5; wing, 2.85; tail, 1.80; culmen, 0.80; 

 gonys, 0.4G; width of mandible at base, 0.35; depth of bill at base, 

 0.42; tarsus, 0.90; middle toe, 0.(38. 



Zuolt)gy 111' 11k' lieagle, Birds, p. 105. 



