206 Brewster on a Collect ion of Arizona J^irds. 



io8. Contopus virens richardsoni ( S-icain$. ) Cotics. 

 Western Wood Pewee. 



371, $ ad., Santa Rita Mountains, Maj 13. Length, 6.40: extent, 10.70. 

 " Iris dark brown: bill black above, duskv below." 



109. Empidonax flaviventris difiicilis 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. Dijfficilis. however, seems to be 

 a pretty strongly characterized race, if not, as Mr. Ridgway has lately 

 ranked it, a distinct species. 



4S4, $ ad.. Camp Lowell, June 3. Length, 5.50; extent, S. 10: wing, 

 2.60; tail, 2.46. 



517. 5 ad.. Tucson. Jime 10. Length. 5.50: extent. 8.10: wing. 2.46: 

 tail. 2.52. 



1 10. Empidonax pusillus {S-wains.) 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 I'egion 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. 



111. Empidonax hammondi {Xa//tns) Baird. Ham- 

 mond's Flycatcher. 



172, $ ad., near Tombstone. April 12. Length. 5.40; extent. 8.90. 



237, $ ad., Tucson, April 19. Length, 5.40; extent, 8.70. 



363, $ ad., Santa Rita Mountains, Maj' 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. 



112. 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. 



