750 ZOOLOGY. 
in properly acknowledging the same. Address Mr. C. V. Riley, 
St. Louis, Mo. 
Tue OLIVE-SIDED FLYCATCHER. — The olive-sided flycatcher 
(Contopus borealis), though usually considered as a very rare bird, 
is quite abundant in some parts of Lewis, Herkimer and Hamilton 
counties in northern New York, where it breeds. 
It is never found where there are no coniferous trees, and among 
them seems to have a decided partiality for old hemlocks. On the 
12th of June, 1873, while hunting on Tug hill (Lewis Co.), I heard 
a bird utter a peculiar short whistle in a swamp directly ahead of 
me. I recognized the note as one I had heard in Idaho, but could - 
not at once recall the species; so, guided by its oft repeated note, 
I entered the swamp and soon had the pleasure of seeing a fine 
olive-sided flycatcher perched on a dead limb on the top of a large 
emlock. I shot this specimen, which proved to be an adult male 
in splendid plumage ; I also sugceeded in obtaining the female near 
the same spot. 
At Big Moose lake, in Brown’s Tract, they were quite numerous, 
and there we obtained several specimens (in July). They all 
seemed to have the same hab t of choosing a large hemlock tree 
with a few dead branches on top, and were sure to light on the up- 
permost twig. Their note, which is a short whistle, greatly resem- _ 
bles O-wheo, O-wheo, with the accent on the whe, and the voice 
falling at the last o. They sometimes repeat this note several 
times in succession, but generally not more than once or twice. 
I was not so much surprised at finding this species breeding 
with us in Lewis Co., N. Y., because it is a very interesting local- 
ity for the ornithologist, and many rare northern birds are found 
there; but I must say I was surprised on September 10th, while 
hunting at Easthampton, Mass., at procuring a fine Contopus 
borealis in a small grove of pine trees within a mile of town. 
Since that date I have searched diligently for this bird in the same 
and similar localities about Easthampton, but as yet umsuccess- 
fully. Has this species ever been obtained in Massachusetts be- 
fore?— C. HARTE Merriam, Jr. 
Ayorner Monster.—To the list given by me in the July 
number (page 435) must now be added a young cock, possessing 
a supernumerary wing, attached by ligaments to the ninth cervical 
vertebra, and hanging over upon the right side of the chest. It 
