250 THE AMERICAN MIDLAND NATURALIST. 
locality on May 24. Mrs. Tuttle records it at Osage on 
October 1, 1914. 
201. Oporornis philadelphica (Wilson) Mourning War- 
bier.. A rare migrant, listed by Brown for Willow Pond. 
My latest record is for May 25, 1917, three individuals seen 
in Wildwood Park. 
202. Geothlypis trichas trichas (Linn.) Maryland Yellow- 
throat. The Maryland Yellowthroat is a common summer 
resident in Floyd and bounding counties. It arrives in the 
last week of April or the first ten or twelve days of May, and 
becomes common almost as soon as it arrives. It builds its 
nest on the ground, near clumps of high grass or low bushes, 
particularly in sloughs and near marshy streams. . The 
eggs are laid in the first week of June. The species departs 
in the second or third week of September, with a few strag- 
glers hanging over into October. 
203. Icteria virens virens (Linn.) Yellow-breasted Chat. 
The Yellow-breasted Chat is a rare species in Floyd, Cerro 
Gordo, and Mitchell Counties. I saw two individuals north 
of Floyd on May 20, 1918, my only record... Anderson says: 
ial Slee ANE have a specimen in my collection taken in Cerro 
Gordo county by J. E. Law, May 30, 1891.” (Bds. of Ia., 1907, 
363). 
204. Wilsonia pusilla pusilla (Wilson) Wilson’s Warbler. 
A rather uncommon migrant. Listed by Brown for May 13 
to 16, at Willow Pond, and myself on May 24, 1917. 
205. Wilsonia canadensis Linn.) Canada Warbler. An 
uncommon or rare migrant, spring arrival dates ranging 
from May 19 to 23. I have only one autumn record, that for 
September 2, 1920. 
206. Setophaga ruticilla (Linn.) Redstart. An abundant 
migrant and tolerably common summer resident. Spring 
arrival dates range from April 28 to May 12. The birds re- 
main until late August, and I have occasionally seen them in 
the first week of September. 
207. Anthus rubescens (Tunstall) Pipit. So far as 
I have been able to determine, this species called “a tolerably 
common migrant in Iowa” by Dr. Anderson, is a rare migrant 
