256 THE AMERICAN MIDLAND NATURALIST. 
catcher. Mr. Brown and I have seen birds which we referred 
to this species, and Mrs. Tuttle reports it from Osage. Mr. 
Gabrielson strongly questions all the records. 
6. Empidonax virescens (Vieill.) Acadian Flycatcher. 
Same data as above.’ 
7. Octocoris alpestris hoyti Bishop. Hoyt’s Horned Lark. 
Both Mr. Brown and I have seen birds which we assigned to 
this subspecies. See migration record for 1917. Mr. Gabriel- 
son’s comment is: “Possible, but ought to be collected.’* 
8. Sialia currocoides (Bechst.) Mountain Bluebird. A 
pair of birds that I feel certain belonged to this species 
nested in the extreme southern part of Charles City in 1914. 
I watched them for considerable lengths of time, and was able 
sketch the male. Both birds correspond to descriptions and 
figures of the Mountain Bluebird, and to specimens which I 
have examined later at the Field Museum and the Chicago 
Academy of Sciences. The nest was in an old woodpecker 
hole, about three and one-half feet from the ground. It was 
deserted by the birds when a flock of sheep were let into the 
pasture in which it was located, and before I could secure the 
eggs all but one of them were damaged by a Red Squirrel. 
The first egg was laid the 26th of April; the fourth, five days 
later. The nest, one egg, and fragments of two others are in 
my collection. 
Regarding this record Miss Sherman says: “I do not see 
how you can possibly be mistaken in the Mountain Bluebird,” 
and I am quite sure that I am not. But Mr. Gabrielson com- 
ments: “This is almost certainly a case of mistaken identi- 
fication, as the species has never been known to nest east of 
the Black Hills.”’ Unfortunately, the eggs, which I showed 
to Dr. Bailey, do not seem to settle the question. 
* Dr. Stevens thinks one should have no trouble’ identifying the 
Acadian Flycatcher when he has “become sufficiently acquainted with it.” 
But there’s the rub. : 
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