238 THE AMERICAN MIDLAND NATURALIST. 
roost at about 5000; within a week it increased by at least 
half. August 17, 1917, I counted 230 birds in one tree, and 
there were more than forty trees apparently as crowded. 
Exactly two years later (August 17, 1919) 3000 would have 
been a liberal estimate of the number at this roost. 
Coincident with the partial desertion of the St. Charles _ 
Street roost, one was established on East Clark Street, ap- 
parently taking up the majority of the birds that had been 
coming from the southwest to the St. Charles roost. This 
inference is substantiated by the fact that the southwest 
route to the latter roost became almost deserted. In middle 
August, 1919, there were some 1200 birds in the Clark Street 
roost; within a week the number was about doubled. In 1920 
the birds were so numerous, and occupied trees so close to 
sidewalks that they were decided nuisances. Oddly enough, 
as the colony increased in size it shifted its location westward 
toward the business section of town. In 11 days it covered 
four blocks, and reached a maximum of about 2000 birds. 
In an evergreen grove on the grounds of C. G. Patton on 
the southern outskirts of Charles City is a nesting colony that 
averages about 125 pairs, with a maximum of about 1200 
birds during August. Near Rockford, Nora Springs and 
Rudd, and in the woods north of Floyd are small roosts, 
accommodating about 1000 birds each. 
131. Hesperiphona vespertina vespertina (Cooper.) Even- 
ing Grosbeak. The only data for Floyd County for this 
species is taken from Keyes and Williams. “It is... re- 
ported from Charles City in March” (Bds. of Ia.,1889, 140.) 
The record is probably to be attributed to Mr. Williams. 
132. Pinicula enucleator leucura (Miiller.) Pine Gros- 
beak. Rare winter visitant; “a few small flocks appeared in 
the vicinity of Charles City in winter of 1878-79’’ Keyes and 
Williams, Bds. of Ia., 1889, 140.) Webster says that he has 
occasionally seen the species near Rockford in winter. Jan- 
uary 5, 1918, a flock of 8 of these birds was seen near my 
home on east Clark street, Charles City. 
133. Carpodacus purpureus purpureus (Gmel.) Purple 
Finch. The Purple Finch is an uncommon migrant. Howard 
Clarke Brown saw 8 individuals on Hawkins ave., Charles 
