Brewster on a Collection of Arizona Birds. 83 
The first specimen was shot April 15 at Cienega Station, where, 
during the succeeding three days, six morp were obtained. They 
frequented large willows along the banks of a stream and, like 
Kinglets, spent much of their time searching for food at the ex- 
tremity of the branches. Although active and restless, they were 
not at all shy. The only note heard here was a sharp “tseeft.” 
On April 18 Mr. Stephens reached Tucson, where almost the 
first birds met with were Lucy’s Warblers. During the early part 
of his stay they were more abundant among the mesquites than 
any other species, and their ^tseefing ” could be heard on every 
side. They were continually in motion, flying from tree to tree, 
and occasionally visiting some low brush in the vicinity. By the 
28th their numbers became perceptibly diminished, but many re- 
mained to breed in the surrounding country. The presence of 
the species at Camp Lowell is attested by a single young specimen, 
barely large enough to fly, which was taken there on June 1st, 
but which is unaccompanied by any special remarks. An adult 
male from the Santa Rita Mountains, however, comes to me 
with the following comments, under date of May 19 : — “This 
is the only one of the species which I have seen here. It was 
near the banks of a stream below the mouth of a canon, where 
there were a few mesquites interspersed among the oaks. I 
watched it for some time. It lingered among the mesquites, 
seeming to prefer them to the oaks, in which, however, it occa- 
sionally alighted for a moment.” 
In addition to the above, Mr. Stephens’ notes supply some 
very important information regarding the previously doubtful 
nesting habits of this species. A female taken April 25, 
proved on dissection to be about to lay, but no eggs were 
actually taken until May 8, when a full set of five was found 
near Tucson. After that date many nests containing either eggs 
or young were examined. Their sites were variable ; the charac- 
teristic place, like that of the specimen discovered by Captain 
Bendire, was behind the loosened bark of a large tree, but use 
was frequently made of old Woodpecker’s nests, knot-holes, and 
in short all sorts of crevices. A brood of nearly fledged young 
(one of which is before me) was actually taken from the de- 
serted domicile of a Yellow-headed Titmouse, which had been 
appropriated by the new tenant without any apparent repairs or 
alterations. Among Helmint hop Mice this Wren-like mode of 
nidification is, I believe, peculiar to this species. 
