Il8 THE CHICAGO ACADEMY OF SCIENCES. 



A not uncommon summer resident, breeding locally in the 

 rather heavy timber in the northwestern portion of our area. It 

 arrives early in May and departs about the twenty-fifth of Sep- 

 tember. Mr. Robert Kennicott includes this species in his list 

 of Cook County birds* with the annotation, "Abundant," and 

 says that it is known to nest in Cook County. Mr. E. W. Nelson 

 says :f that it is "A rare summer resident." Mr. Robert Ridgway 

 says :J "This is probably the most numerous and generally dis- 

 tributed species of the genus in the State." 



The range of this species covers the eastern United States, 

 excepting that it is rare or casual in the New England states. 

 It breeds nearly throughout its range, and migrates southward to 

 Cuba and Yucatan. 



Empidonax traillii (Audubon). Traill 's Flycatcher. 

 Muscicapa traillii AUDUBON, Orn. Biog., I, 1832, 236. 

 Tyrannus traillii NUTTALL, Man., ed. 2, I, 1840, 323. 

 Empidonax traillii BAIRD, B. N. Amer., 1858, 193. 



Empidonax pusillus var. traillii B. B. & R., Hist. N. Amer. B., II, 

 1874, 369, pi. 44, fig. 8. 



A not uncommon summer resident, arriving early in May and 

 departing in September. It is more common during its migra- 

 tions. Mr. B. T. Gault and the writer observed a brood of young 

 birds, of this species, near Calumet Lake, July 10, 1896. 



The range of this species includes the Mississippi Valley, from 

 Ohio, Illinois and Michigan westward to the Pacific coast, and 

 from the Fur Countries southward into Mexico. 



Empidonax minimus Baird. Least Flycatcher. 



Musicapa acadica "GMELIN," NUTTALL, Man., I, 1832, 288 (nee 



Gmelin). 

 Tyrannula minima BAIBD (W. M. & S. F.), Proc. Acad. Nat. Sci. 



Philadelphia, July, 1843, 284. 

 Empidonax minimus BAIBD, B. N. Amer., 1858, 195. 



A rather uncommon summer resident, arriving early in May 

 and departing early in September. 



The range of this species includes North America east of the 

 Great Plains. It breeds from the northern United States north- 

 ward, and winters southward at least into Central America. 

 Westward it is a casual visitor to the base of the Rocky Moun- 

 tains. 



*Trans. Illinois State Agri. Society, Vol. I, 1853-1854. 582. 



tBirds of Northeastern Illinois. Bull, of the Essex Institute, Vol. VTTI, 1876, 114. 



^Ornithology of Illinois, Vol. I, 1889, 357. 



