Western Robin 525 
autumn and winter it subsists to a great extent on berries, 
and Trippe states it is to be found in very large numbers 
among the Blueberry patches on the mountain sides, 
in September. Its note is cheerful and musical, but 
not especially remarkable. 
The nest is built of twigs, stiff plant stems and grasses 
outside ; this is cemented and lined with wet mud, and 
when dry an inner lining of fine grasses is added, the 
whole forming a compact and strong structure. It is 
placed in a bush or small tree, generally on a crotch, 
and nearly always low down. The eggs, usually four 
in number, are plain, unspotted, and greenish-blue in 
colour, and measure about 1'1 x °80. 
Two or even three broods are raised in the year, the 
time for finding fresh eggs extending from May 15th 
to July 5th according to Gale’s observations. He 
further believed that a fresh nest for the second laying 
was built at a higher elevation in the mountains by the 
hen before the first brood was fledged, and that the cock 
bird remained behind at the lower level to look after 
the first brood until they were able to leave the nest and 
fend for themselves. 
Dr. Bergtold has recently given a very interesting 
account of a series of albino robins observed by him and 
others in the City Park in Denver during four successive 
years, from which it appears that the albinistic characters 
may in this case have been hereditary. 
Genus SAXICOLA. 
Bill shorter than the head, straight and depressed at the base; 
wings long and pointed ; outer primary very short, not a quarter the 
length of the next; tail much shorter than the wing, about square ; 
plumage without spots or streaks in the adult and with the basal 
portion of the tail and coverts white. 
An extensive Old World genus, one species of which is a straggler 
in the United States. 
