222 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4TH Ser. 
along the shore, although it was occasionally seen inland. 
On July 28, twenty were seen in the former locality, and only 
one or two inland. At James Bay, in the following month, 
August, I noted two about the lagoons at the beach. 
On Tower in September a few were seen, this species and 
the Black-eared Mockingbird being the commonest land 
birds on the island, which is low and in the arid belt. A few 
were also seen on Bindloe a day or two later; this island is 
also low and rises little if any above the arid belt. On 
September 19, on the south side of Abingdon, for three or 
four hundred feet below the fern belt at the summit, I saw 
this species commonly. They seemed to keep dry, as on 
Indefatigable, despite the continual rain. The following day 
in the arid belt three or four were noted. One male was 
in full song as he hopped about the dry bushes. On Wenman 
six or eight were taken in all. Four or five were taken on 
a landslide on the north side of Culpepper. 
These birds fed in the trees and bushes and were not 
ground feeders. They were very active and constantly on 
the move, although they examined each twig carefully, often 
hanging head downwards as did the Black-headed Tree Finch. 
They seldom made any flights, but kept entirely in the trees 
and shrubs. They were insect feeders. On December 22, 
however, at James Bay, James, I saw one eating a green leaf. 
Birds were heard singing on southwest Chatham on 
February 23, and at Iguana Cove, Albemarle, on March 19 
and 20. The condition of the reproductive organs was noted 
as follows: 
October 17; Wreck Bay, Chatham; testes enlarged. 
February 23; Wreck Bay, Chatham; large sexual organs. 
September 20; south Abingdon; one male with very large testes. 
September 25; Culpepper; sexual organs large. 
The first nest and eggs of this species were found by Mr. 
Beck on February 13, near the center of the isthmus joining 
the northeast and southwest portions of the island of 
Chatham. The nest contained three eggs incubated about 
six days. A parent was at the nest, which was similar to 
that of a ground finch and was made of orchilla moss, fine 
grass, and cotton balls, lined with shredded grass. It was 
in a bush about two feet above the ground. 
