2o6 Brewster on a Collection of Arizona Birds. 
108. Contopus virens richardsoni ( Swains. ) Cones. 
Western Wood Pewee. 
371, $ ad., Santa Rita Mountains, May 13. Length, 6.40; extent, 10.70. 
“iris dark brown; bill black above, dusky below.” • 
109. Empidonax flaviventris dilEcilis Baird. Western 
Yellow-bellied Flycatcher. 
Both of the following specimens are more decidedly ochraceous than are 
my California examples, the latter, like many Pacific Coast birds, showing 
a closer approach to the eastern form. Difficilis , however, seems to be 
a pretty strongly characterized race, if not, as Mr. Ridgwav has lately 
ranked it, a distinct species. 
484, $ ad.. Camp Lowell, June 3. Length, 5.50; extent, 8.10; wing, 
2.60; tail, 2.46. 
517, $ ad. . Tucson, June 10. Length. 5.50; extent. 8.10; wing, 2.46; 
tail, 2.52. 
no. Empidonax pusillus (Szuai?is.) Baird. Little 
Flycatcher. — A common bird about Tucson, where it in- 
habited willow thickets near water. Numerous nests were taken : 
the one sent me is a loosely woven structure composed chiefly of 
dry grasses, with a neat lining of horse-hair. It agrees closely 
with northern New England nests of E. trailli , and like them 
differs widely from the compact, Yellow- Warbler-like nests 
which trailli builds in the region about Columbus, Ohio, and 
at St. Louis, Missouri.* 
The series of skins is a full one, and the specimens uniformly sustain 
the characters ascribed to pusillus, a race which seems to me quite as con- 
stant as many which have been regarded with less suspicion and disfavor. 
hi. Empidonax hammondi (Xantus) Baird. Ham- 
mond’s Flycatcher. 
172, $ ad., near Tombstone, April 12. Length, 5.40; extent, 8.9a. 
237, $ ad., Tucson, April 19. Length, 5.40; extent, 8.70. 
363, $ ad., Santa Rita Mountains, May 12. Length, 5.30; extent, 8.30. 
No. 237 has the outer web of the external rectrices as white as in average 
specimens of E. obscurus. I have Colorado examples also which cannot 
be separated from obscurus by this character alone. 
1 12. Empidonax obscurus (Swains.) Baird. Wright’s 
Flycatcher. — This species was noted only in the vicinity of 
Tombstone, where .a few were found early in April among scat- 
tered clumps of trees. 
The four specimens collected have the lower mandible pale orange, 
* See this Bulletin, Vol. I, pp. 14-17 and 75-76, and Vol. V, pp. 20-25. 
