Brewster on a Collection of Arizona Birds. 77 
Mountains, where they occurred sparingly among pinons. “They 
are rather tame, and have a habit of sitting perfectly still for sev- 
eral minutes at a time. Flight slow. Food insects.” A fourth, 
taken May 13, in the Santa Rita Mountains, completes the series. 
14. Phamopepla nitens {Swain.) Scl. Black-crested 
Flycatcher. — The life history of this singular bird has been 
so fully given by Dr. Coues in “Birds of the Colorado 
Valley,” that there is little chance of adding anything new. 
Most of the specimens obtained by Mr. Stephens are from Camp 
Lowell and Tucson, but he did not find it abundant at either of 
these points. He speaks of it as having “ a sweet but not loud 
song,” and remarks on its known fondness for mistletoe berries. 
“ Iris red.” 
15. Polioptila caerulea {Linn.) Scl. Blue-gray Gnat- 
catcher. — Eight specimens, representing the following localities : 
Chiricahua Mountains (two £ , two 9? April 1-6) ; Tombstone 
( $ , April 5) ; Cienega Station ( $ , April 16); Tucson ( $ , 
April 20) ; Santa Rita Mountains ( $ , May 20). 
1 6. Polioptila plumb e a Baird. Black-capped Gnat- 
catcher. — This Gnatcatcher was observed at Tucson, Camp 
Lowell, and near Yuma, specimens being taken in all these lo- 
calities. A female shot at the first-named point on April 23 had 
evidently finished laying, but a nest found June 27 near Camp 
Lowell contained a perfectly fresh egg, while another taken at 
Yuma, July 15, had a single egg of its owner and one of the 
Dwarf Cowbird. These dates indicate that the species breeds at 
least twice during the season. 
The Yuma nest, although a delicate structure, will not compare 
with that of P. ccerulea. It entirely lacks the exterior coating of 
lichens so effectively employed by the commoner bird, and in its 
general appearance closely resembles the Redstart’s well-known 
domicile, being similarly felted of soft bark-strips and hemp-like 
vegetable fibres. It is lined with down from plants, a few 
feathers, and the hair of some small quadruped. Externally it 
measures 2.25 in width by 1.55 in depth; internally 1.45 by 1. 
The egg is pale greenish-blue, coarsely and very evenly spotted 
with reddish-brown. Its measurements are * 53 X- 4 2, This nest 
was placed in a bunch of mistletoe, at a height of about eight 
feet from the ground. It is accompanied by the male parent, 
who revealed its position by repeatedly entering the mistletoe, 
