250 CALIFORNIA ACADEMY OF SCIENCES  [Proc. 41H Ser. 
33. Camarhynchus prosthemelas: BLACK-HEADED TREE FINCH 
Abingdon, Albemarle, Barrington, Champion, Charles, 
Chatham, Cowley, Duncan, Gardner-near-Charles, Indefati- 
gable, James, Jervis, Narborough, Seymour, and Wenman 
islands. 
This, the smallest of the tree finches, has its strongholds on 
Albemarle, Charles, Chatham, Indefatigable, and James. On 
the other islands it was not found to be common. It was not 
seen in flocks as were the ground finches. Abingdon and Wen- 
man are islands from which it has not been previously reported. 
Whether the birds found there were rare residents or accidental 
visitants is an open question. No tree finch was encountered at 
sea. On south Abingdon on September 19, one was taken and 
two others were seen; on the following day another was taken. 
Four were taken on Wenman on September 24. Three or four 
other species, which were known only from islands to the south- 
ward, were also secured. On the west side of Tagus Cove 
Mountain, Albemarle, this species and the Sooty Ground Finch 
seemed to be the commonest finches. 
They were found from the seashore to the mountain tops, in 
the arid region, in the region intermediate between the arid 
and the humid, in the forested humid region, and in the grassy 
region of the higher mountains. They were found in the arid 
regions of all the islands except Abingdon and Narborough. 
On the latter we saw none. They were found in the zone inter- 
mediate between the arid and the humid, and in the forested 
humid regions of all the islands named above that are of 
sufficient height to have such a region. On southeast Albemarle 
they were found about the scattered heliotrope bushes growing 
in the grassy, treeless country above Santo Tomas. They were 
found about the lagoons and shores of some of the larger 
islands. They were common about the spring in the interior of 
Charles in October. This spring was the great rendezvous of 
finches and doves in the dry season. On south Indefatigable in 
january, they were seen up to about 700 feet elevation. 
Their numbers, of course, varied from day to day, but they 
were found in most cases to be commonest in the transition and 
humid regions, rather than in the arid. Two were taken in the 
mangroves on south Indefatigable and one was also seen feed- 
ing on the ocean beach proper. They were even seen on the 
