THE BIRDS OF FLOYD COUNTY, IOWA. 245 
remaining until early or middle September. Nests are built 
under the eaves of barns and other outbuildings, and very 
rarely against some cut bank. This original nesting habitat, 
however, seems to have been virtually abandoned. 
166. Hrundo erythrogaster (Bodd,) Barn Swallow. This 
Swallow is the commonest bird of its family in the region. 
My earliest arrival date is April 26 (1917,) and Mr. Brown 
did not supply me with any earlier. The date of departure 
varies from September 4 to-12. 
167. Iridoprocne bicolor (Vieillot.) Tree Swallow. A 
tolerably common migrant, and uncommon summer resident. 
Arrival is from April 26 to May 8 so far as available 
records show. : 
168. Riparia riparia (Linn.) Bank Swallow. A common 
summer resident, arriving April 14 to 26 and departing in the 
second week of September. It nests abundantly in gravel 
pits, cut banks, and steep hillsides. A colony of from 25 to 
40 pairs regularly nests at Hackberry Grove, in Cerro Gordo 
County. 
169. Steligidopteryx serripennis [Aud.) Rough-winged 
Swallow. A tolerably common migrant but an uncommon 
summer resident. Arrival is in late April, departure in Sep- 
tember. Nests not observed. 
170. Bombycilla garrula (Linn.) Bohemian Waxwing. 
The Bohemian Waxwing is a rather irregular and uncommon 
migrant; so far it has not been observed during the winter. 
On April 2, 1915, I observed about fifteen of these birds in 
some evergreens near the center of Charles City. Mrs. Tuttle 
reports the species at Osage as late as May 22, but Mr. 
Gabrielson questions the record. On June 8, 1917, Mr. Brown 
and I saw four birds in Wildwood Park, and think we were 
accurate in identifying them as B. garrula. We were within 
ten feet of the birds, and the ‘chestnut-rufous’ tail coverts, 
emphasized by Chapman, were seen very plainly. 
171. Bombycilla cedrorum (Vieill.) Cedar Waxwing. An 
irregular but common migrant; rare summer resident. It ap- 
pears in the spring in early April, and on into May; in the 
autumn is seen from about October 20 to the middle of No- 
vember and occasionally later. I have found no nests, but the 
