THE BIRDS OF FLOYD COUNTY, IOWA. 241 
hopper Sparrow. A common summer resident, arriving in 
early April and departing about the middle of October. The 
nests, which are in fields or little-used pastures are built in 
early June. 
144. Passerherbulus henslowi henslowi (Aud.) Henslow’s 
Sparrow. A tolerably common summer resident throughout 
the county, arriving in the first week of April and departing 
in October. Nesting dates not ascertained. 
145. Passerherbulus lecontei (Aud.) Leconte’s Sparrow. 
This species seems to be a rather uncommon migrant, arriving 
in early April. It has been observed near Charles City by 
Howard Clarke Brown, Mrs. May Tuttle and myself. 
146. Chondestes grammacus grammacus (Say.) Lark 
Sparrow. A rather uncommon migrant and an uncommon 
summer resident. The species arrives in late April or early 
May, and Mrs. F. May Tuttle, of Osage, Mitchell County, re- 
cords it for that county in early May. 
147. Zonotrichia querula (Nutt.) Harris’s Sparrow. A 
rather irregular but common migrant. It arrives from March 
24 to April 15, the latter being an exceptionally late date. 
It passes south about the middle of October. 
148. Zonotrochia leucophrys leucophrys (Forst.) White- 
crowned Sparrow. A rather uncommon migrant. My spring 
arrival dates range from April 12 to 25; autumn, September 
6 to 30. It frequents semi-open oak woods. 
149. Zonotrochia albicollis (Gmel.) White-throated Spar- 
row. The White-throated Sparrow is a common migrant in 
Floyd and adjoining counties. The first arrivals are about 
April 12, and the species becomes common in the course of 
3 or 4 days. The height of the migration comes in the last 
week of April. Autumn records range from September 16 
to October 21. In contrast with the White-crowned Sparrow, 
this species frequents thickets, particularly along streams. 
150. Spizella monticola monticola (Gmel.) Tree Sparrow. 
The Tree Sparrow is a common migrant and winter resident, 
associating with juncos in the winter. It arrives in early or 
middle October, and is common throughout the winter, de- 
parture taking place in early April. 
151. Spizella passerina passerina (Bechst.) Chipping 
