ART. 10 BIRDS OF PINCHOT EXPEDITIOISr FISHER AND WETMORE 61 



CERTHmEA OLIVACEA LUTEOLA Ridgway 



Chatham Island certhidea 



Certhidca luteola Ridgway, Proc. U. S. Nat. Mus., vol. 17, November 15, 1894, 

 p. 360. (Chatham Island, Galapagos Archipelago.) 



Three specimens were obtained on Chatham Island, two adults on 

 July 3, and a bird in juvenal dress on July 4, 1929. 



CERTHIDEA OLIVACEA MENTALIS Ridgway 



Tower Island certhidea 



Certhidea mentalis Ridgway, Proc. U. S. Nat. Mus., vol. 17, November 15, 

 1894, p. 359. (Tower Island, Galapagos Archipelago.) 



A female was secured at Tower Island, June 14, 1929. 



Certhidea is another of those plastic genera that can not resist those 

 all-powerful but mysterious forces that bring changes caused by 

 environment. On Indefatigable, Chatham, Tower, Hood, and Bar- 

 rington Islands we found forms specifically or subspecifically differ- 

 ent, but the same so far as habits go. The bird was looked for 

 carefully on Charles Island, but without success. 



It v/as a confiding little bird, and seemed anxious to be as near 

 the observer as possible. In its movements it reminded one much 

 of a pine siskin. They often were in mixed flocks with ground 

 finches and all seemed in perfect harmony with one another, quite 

 in contrast with the mockers and golden warblers. They usually 

 keep in low shrubbery and are rarel}- found in the trees. 



PINAROLOXIAS INORNATA (Gould) 



Cocos Island finch 



Cactorms inornatus Gouu), Proc. Zool. Soc. London, 1843, p. 104. (Bow 

 Island=Cocos Island.) 



Eight skins and two skeletons secured on Cocos Island June 4, 7, 

 and 10, 1929, by A. K. Fisher include four males and six females. 

 As few measurements have been published the following will be of 

 interest : 



Four males, wing, 64.4-67.3 (65.8) ; tail, 40.7-41.2 (40.9) ; culmen 

 from base, 14.1-14.7 (14.4) ; tarsus, 21.2-21.7 (21.3) mm. 



Six females, wing, 61.3-65.2 (62.9) ; tail, 39.5-43.6 (41.3) ; culmen 

 from base, 12.8-14.3 (13.4) ; tarsus, 20.0-22.3 (21.2) mm. 



The fully adult female has the bill blackish, while in immatures 

 of that sex the bill is yellowish brown, more or less obscured by 

 dusky at base in tip. The immature female in addition has the 

 rectrices prominently tipped with brown. 



The general movements and actions of this little bird were more 

 like those of a hone};' creeper than any other finch that has come 



