APPENDIX A 429 



13 Certhidea cinerascens Ridgway 



Gray Certhidea 



Two pairs nesting on the island, one on each side of 

 the central ridge. The first nest was complete, two 

 feet from the ground, large and globular, and contained 

 a single egg. I shot the female and collected the nest, 

 as the egg of this species is still undescribed. The 

 second pair was still building, the nest almost completed 

 and composed wholly of moss. Both males were singing, 

 and although quite out of sight of one another, the 

 songs alternated, the one on the east of the ridge wait- 

 ing until the song of the bird on the other side was 

 ended. The song was of the simplest, a sibilent Sip-sip- 

 sip-sip — chew — chew — chew! 



14 Dendroica petechia aureola (Gould) 



Galapagos Yellow Warbler 



One of these warblers hopped about the bushes near 

 me for a while and then flew away in the direction of 

 Gardner. 



15 Geospiza conirostris Ridgway 



Conebilled Ground Finch 



Two pairs on the island, one nesting. There were two 

 nests, one old, evidently last year's, and one just finished. 

 Both males were singing from the top of a bush or 

 cactus, and taking short flights between songs, often 

 followed by the females. The notes were of the simp- 

 lest, but given with great impetus, in a hoarse voice, 

 Chuckel-low! The eggs of this species are also un- 

 known, but the nest was empty. 



16 Geospiza fuliginosa Gould 



Sooty Ground Finch 



There were five pairs on the island, two building nests, 

 one with a full-grown young, stuffing it with small, 

 green measuring worms, which had almost defoliated 



