f. /? /yUc£ ,,cll . 
— — *' 
CV </«£*. f / 7 . y\ : Empidonax acaficus, 
Bull. N, 0.0. 3, July, 1878. p./X?. 
£ /? /3^cA^et 
Empidonax acadicus. Acadian Flycatcher. _ Arrives the last 
T*® k m , May> and “ " ot ™«>mmon during the summer, frequenting cool 
shaded glens or retired woodland usually near a running stream. In any 
such favorable location in the vicinity these birds may be found every 
summer though I have never found more than a single pair occupying 
any one locality, and know of perhaps six such pairs which are with us 
every season. The almost proverbial inconstancy and variableness of these 
birds in the construction of their nests in different parts of the country is 
even apparent at a single locality. Indeed, two nests in my collection 
which were taken within a mile of each other, are so entirely dissimilar 
that were they not positively identified, it would be difficult to believe that 
they belonged to the same species. This mutability exhibited by the 
species m question is not confined solely to the construction of their nest • 
for m one of the above-mentioned nests the three eggs were almost incu- 
bated on June 18, while in the other the last of three eggs was deposited 
on June 28, showing a difference of at least three weeks in their time of 
laying. It is worthy of remark that the first nest found was much more 
warmly and compactly constructed than the latter, possibly the result of 
foresight on the part of the bird. 
BUU ‘ N,O,0 ‘ 3. July, 1876, p, /J/ _ /Jj . 
V 
I/S’ 
