a8 RECORDS VOLUME XII, FEB. 1920. 
ginning of an elongated portion as in the 
Fork-tailed Flycatchers of the genus Musci- 
vora. The feather is also widened a little on 
the terminal third, thus is a little spatulate. 
Fig 1 B. The outer tail feather of the young 
bird is simply pointed as in most young and 
is not widened terminally. Fig. 1] H. 
The advantage of these long incisions of 
the primaries of the adult Arkansas King- 
bird, which subsists upon insects captured 
when flying, in an open, often wind-swept 
country, is obvions, as it enables the birds 
to turn at sharp angles against great air pres- 
sure. 
The Cassin Kingbird has primaries less 
incised, the outer five being about asin the 
lst figured on plate 1 B a, butin the Couch 
Kingbird the incision is much less, ib. b. In 
our Kingbird the outer primary only is in- 
cised to any extent, see plate 2. A c, and in 
the Gray Kingbird it is quite similar, ib. a. 
In color, the young kingbird from Mars- 
ton’s Miilis much paler than the adult, see 
