406 THE AMERICAN MIDLAND NATURALIST 
Hairy Woodpecker, Cardinal, Red-winged Blackbird, Cowbird, 
Towhee, Sparrow Hawk, Vesper Sparrow, Baltimore Oriole, 
Crested Flycatcher, Red-eyed Vireo, Alder Flycatcher, Night- 
hawk, Maryland Yellowthroat, Scarlet Tanager, Balckburnian 
Warbler. It is difficult to account for the absence of such common 
species as the Cowbird, Towhee, and Crested Flycatcher. And 
even in the case of the Baltimore Oriole, I have always made in 
former years at least one or two records of this species in September. 
To me nothing in the life of a bird seems more mysterious than 
its migratory habits. Nearly every species will show, at least 
occasionally, some marked irregularity in its migration. 
The Spotted Sandpiper departed on Sept. 20; the Warbling 
Vireo, on Sept. 25; the Purple Martin, on Sept. 24; the Bobolink, 
on Sept. 13; the Barn Swallow, on Sept. 2; the Hummingbird, on 
Sept. 22; the Redstart, on Sept. 27. The Red-breasted Nuthatch 
arrived on Sept. 23; the Hermit Thrush, on Sept. 7; the Golden- 
crowned Kinglet, Black-throated Green Warbler, Snowbird, 
White-throated Sparrow, on Sept. 21; the Pine Warbler, on the 
24th; the Sapsucker, on the 25th; the Ruby-crowned Kinglet, 
Browu Creeper, and Nashville Warbler, on the 28th. 
Some observations made in September :—Sept. 5.—Black and 
White Warblers creeping and flitting in trees at the edge of an 
oak grove; saw only young birds.—Sept. 13.— First Meadowlarks 
reappeared—no record since Aug. 5, when I went to Bankson 
Lake, Mich.—Sept. 21.—Migration becoming stronger.—Sept. 22, 
Killdeers plentiful on the shore of a small lake—Sept. 27.— 
Golden-crowned Kinglets numerous in oak groves and evergreens.— 
Sept. 28.—Least Flycatcher, on a wire fence—looks like a di- 
minutive Phoebe.—Very faint call-note of a Catbird in bushes 
on a roadside——Brown Thrashers, plentiful in bushes along a 
road; Ruby-crowned Kinglet and Nashville Warbler here too. 
In October, 1915 I found forty-two species. These were: 
Crow, Blue Jay, White-breasted Nuthatch, Goldfinch, Downy 
Woodpecker, Song Sparrow, Chickadee, Hairy Woodpecker, 
Meadowlark, Bluebird, Robin, Killdeer, Bronzed Grackle, Field 
Sparrow, Flicker, Cowbird, Kingfisher, Mourning Dove, Chimney 
Swift, House Wren, Catbird, Wood Pewee, Least Flycatcher, 
Brown ‘Thrasher, Hermit ‘Thrush, Golden-crowned Kinglet, 
Snowbird, Pine Warbler, Ruby-crowned Kinglet, Brown Creeper, 
Myrtle Warbler, Yellow Palm Warbler, Fox Sparrow, Towhee, 
