18 Lirds of Canada. 
FI. lunifrons—The Cliff Swallow. 
The Cliff Swallow is black, above ; white, 
beneath ; tail, green. Builds its nest under pro- 
jecting cliffs; eggs, six, white, with a purplish 
tint. Feeds upon insects. 
Ff, riparia—The Bank Swallow. 
This is the smallest of the swallows. Color, 
above, grayish-brown ; beneath, pure white. It 
takes its name from its habit of making deep, 
winding holes in sand banks, in which it builds 
its nest; eggs, four, pure white. Feeds upon 
insects. 
H1. bicolor —The White-breasted Swallow. 
This well known swallow arrives here about 
the middle of May.. Color, above, metallic- 
green; beneath, white. Nests, in a hole in a 
tree or stub, and sometimes in a martin’s box; 
eggs, four, white. Feeds upon insects. 
Progne purpurca—The Purple Martin. 
This pretty and interesting bird arrives in 
Canada early in April. Color: the old males 
are glossy steel-blue all over; the females are 
glossy steel-blue above, and pale brown beneath. 
Two broods are raised during the season. Nests, 
in a hole in a tree, or martin’s box; eggs, four 
or ‘Six, pure white. Early in sseptember tne 
martins leave for the south. 
