210 CALIFORNIA ACADEMY OF SCIENCES  [Proc. 41x Ser. 
On June 30 Mr. Beck took two showing albinistic tenden- 
cies. One had a white tail feather, the other had white feath- 
ers in the upper side of the wings. 
This species is very tame, coming up close to inspect one 
and often following a person about. One day one alighted on 
a short walking stick I carried. : 
15. Nesomimus adamsi: CHATHAM ISLAND MOCKINGBIRD 
Chatham Island. 
This species was common and was found in the littoral, 
the arid, the humid forested, and the humid grassy zones. 
During the breeding season it kept more under cover than at 
other times, and fewer were seen. Few were seen during 
September in the Wreck Bay region. They were observed 
on the isthmus to the eastward of the mountainous part of 
the island and were also common in the crater of Finger 
Point, a high promontory on the north coast. In the humid 
grassy country about Mount San Gioacchimo they were found 
in the lemon groves, which have been introduced. 
Like the other species of the genus, they are active birds, 
being at home either on the ground, in the trees, or in the air. 
In my notes I have mention of birds singing on the fol- 
lowing dates: 
January 25; Wreck Bay. July 5; Wreck Bay. 
February 8; Basso Point. July 7; Wreck Bay. 
February 10; Sappho Cove. September 7; Wreck Bay. 
February 23; Wreck Bay. 
Birds taken on February 23, at Wreck Bay, had large re- 
productive organs. 
Eggs and nests were found as follows: 
On January 26 Mr. Hunter obtained three well-incubated 
eggs from a nest taken in the vicinity of Wreck Bay. On 
January 29 I saw a bird building a nest high in a tree. The 
nest appeared to be made of loose twigs. 
On February 8, on the mountain above Basso Point, Mr. 
Beck obtained a nest and one fresh egg. The nest was made 
of twigs and moss of two or three species and lined with fine 
grass stems. It was placed in a small bush and was nine feet 
