THE NATURAL HISTORY SURVEY. 117 



The range of this species includes the whole of temperate 

 North America, breeding from the northern border of the United 

 States northward to British Columbia and the Saskatchewan 

 River. 



Genus CONTOPUS Cabanis, 1855. 



Contopus virens (Linnaeus). Wood Pewee. 



Muscicatpa virens LINNAEUS, S. X., ed. 12, I, 1766, 327. 

 Tyrannus virens NUTTALL, Man., ed. 2, I, 1840, 316. 

 Contopus virens CABANIS, J. f. O., III. 1855, 479. 



The Wood Pewee is a common summer resident, arriving 

 early in May, and departing from the first to the last of October. 



The range of this species covers eastern North America, west 

 to the Great Plains, and from southern Canada southward. It 

 breeds nearly throughout its range in the United States and 

 Canada. In winter, it migrates southward through eastern 

 Mexico to Guatemala. 



Genus EMPIDONAX Cabanis, 1855. 



Empidonax flaviventris Baird. Yellow-bellied Flycatcher. 



Tyrannula flaviventris BAIRD (W. M. & S. F.), Proc. Acad. Nat. Sci. 



Philadelphia, I, 1843, 283. 

 Empidonax flaviventris BAIBD, B. N. Amer., 1858, 198. 



A rather common migrant, arriving early in April and return- 

 ing in September. There are some indications that it may have 

 nested within our limits. Dr. Hoy found it to be a summer 

 resident in the vicinity of Racine, Wisconsin, a few miles north 

 of our area. Mr. E. W. Nelson says:* "A common migrant. 

 The first of July, 1873, I found them quite common in a dense 

 swampy thicket in Northern Indiana, where they had probably 

 nested." 



Its range covers eastern North America, and it breeds from 

 the northern United States northward. In winter it migrates 

 southward through eastern Mexico to Colombia. 



Empidonax virescens (Vieillot). Green-crested Flycatcher. 

 Muscicapa acadica GMELIN, S. X.. I, 1788. 047. 

 Platyrhyncnos virescens VIEILLOT, Xouv. Diet. d'Hist. Nat, XXVII, 



1818, 22. 



Empidonax acadicus BAIBD, B. N. Amer., 1858, 197. 

 Empidonax rirescens BBEWSTER, Auk, XII. April. 1805. 157. 

 Tyrannula acadica Sw., in Bonaparte's Comp. and Geog. List, 1838, 24. 

 Popular synonym: ACADIAN FLYCATCHER. 



*Birds of Northeastern Illinois, Bull, of the Essex Institute. Vol. VIII, 1876. 114. 



