Brewster on a Collection of Arizona Birds. 2(X) 
O. imberbe ridgwayt . — Depth of bill at nostrils, .14 to .15. Above ashy- 
brown ; beneath ash or ashy-white with scarcely any yellowish. 
In the present connection I have examined seven specimens of O. 
imberbe. Five of these, from the collection of the National Museum, 
represent the following localities: Texas (Rio Grande Valley), Mexico 
(Mazatlan and Tehauntepec) and Yucatan (Merida). The remaining 
two, in my own cabinet, were taken at Lomita Ranch, Texas, in March ? 
1880. The result of a careful comparison of this material is that the 
Texas examples prove to be identical with those from Mexico and Cen- 
tral America, while the Arizona birds differ very constantly from all the 
others in respect to the points mentioned above.’ The entire series is, of 
course, a small one, but its evidence seems sufficient to warrant the varietal 
separation of the Arizona form. 
The detection of this Flycatcher in Arizona is perhaps the 
most interesting discovery resulting from Mr. Stephens’ late trip. 
0 . i?nberbe has only recently been added to our fauna by Mr. 
Sennett, and the locality of his single specimen — Lomita, Texas- — 
was so far beyond the previously known range of the species that 
its occurrence seemed hardly likely to prove more than a mere 
accident. In 1880, however, Mr. M. A. Frazar secured addi- 
tional specimens at Lomita, and now an allied, but apparently 
distinct race, turns up in Arizona. 
Mr. Stephens found the curious little bird only at Tucson, 
where his first specimen was taken April 28. Afterwards others 
were shot in the same locality, but they were by no means 
common. The males had a habit of perching on the tops of the 
tallest trees in the vicinity of their haunts, and at sunrise occasion- 
ally uttered a singular song which Mr. Stephens transcribes as 
4 ''yoop-yoof-yooj)eedeedlede§, the first half given very deliberately, 
the remainder rapidly.” A commoner cry, used by both sexes 
in calling to one another, was a shrill 4 fi&r f ibr fi&r fii&r, 
beginning in a high key and falling a note each time.” They 
were very shy, and specimens were obtained only at the expense 
of much trouble and perseverance. Their loud calls were fre- 
quently heard, but when the spot was approached the bird either 
relapsed into silence or took a long flight to resume its calling- 
in another direction. In their motions they resembled other 
small Flycatchers, but their tail was less frequently jerked. 
On May 28 Mr. Stephens met with a young bird which had but 
just left the nest. It was accompanied by the female parent, who 
showed much solicitude and frequently uttered her shrill cries, to 
which the offspring responded in nearly similar tones. Both 
