34 THE O. & O. SEMI-ANNUAL. 
ter, but more of them than on No. 1. No. 3—Well spotted, but less 
than No. 2. Blotches at large end.o8. Nearly half of small spots 
over the body of this egg have a light bluish cast. No. 4—Medium 
number of spots, light and brown. Ground color in whole set white. 
Incubation advanced about four days. From my limited observation 
must conclude that four is the usual number of eggs for this species. 
NESTING OF THE RUBY-THROATED 
HUMMINGBIRD. 
Trochilus Colubris. 
BY J. W. JACOBS, WAYNESBURG, PA. 
The little Ruby-throat is found, during the warm summer months, 
throughout Eastern United States and some parts of Canada. In 
south-western Pennsylvania they arrive about the first of May, and 
before the close of the 
month nest-building be- 
gins. 
Many times have I 
wandered through wood 
and grove in quest of the 
downy, little nest, con- 
taining the two tiny white 
treasures. My first suc- 
cessful search was on the 
29th of May, 1887. It 
was Sunday—everything 
was still—and the heat of the morning sun had not yet sipped up the 
large drops of dew, which would occasionally drop from the tree-tops 
and spatter on our hands or shoulders. As we sauntered along, a 
Woodpecker started from his home in a “stub” and galloped away 
through the thicket ; a frightened ground squirrel sought concealment 
behind a rock; a Red-tail slowly winged his way over the woods, and 
a rabbit bounded away through the weeds and disappeared over a lit- 
tle knoll. 
RUBY-THROATED HUMMINGBIRD. 
