Widmann — A Preliminary Catalog of the Birds of Missouri. 241 



In Missouri a fairly common transient visitant in all parts 

 of the state, spring and fall. It is one of the later migrants, 

 most numerous in the second week of May, but the first arrivals 

 reach St. Louis May 4 or 5, exceptionally earlier, as April 29, 

 1885, May 1, 1884, May 2, 1887. It is quite unsuspicious and 

 its song is often heard during the whole of its stay with us. 

 It generally disappears during the third week of May, mostly 

 17 to 22, but sometimes a loiterer is found later, as May 25, 

 1882, St. Louis. In 1907 both sexes were unusually numerous 

 from May 11 to 24 incl. On their return journey the first reach 

 us in the latter part of August (August 23, 1897; August 24, 

 1898; August 25, 1901) and some are met with nearly to the 

 end of September (September 25, 1897; September 27, 1895; 

 September 29, 1887). 



685a. Wilsonia pusilla pileolata (Pall.). Pileolated Warbler. 

 Myiodioctes pusillus var. pileolatus. Sylvania pusilla pileolata. 



Geog. Dist. — Western North America, north to Alaska. 

 Breeds in higher mountains from Texas north, and throughout 

 the interior west to eastern Oregon and British Columbia. 

 During migration eastward across the Great Plains to Minnesota, 

 eastern Nebraska, western Missouri. In winter from Yucatan 

 to Costa Rica. 



Has been taken at Independence (Ridgway vol. 2, p. 712) 

 and must be regarded as a casual transient visitant along our 

 western border. 



686. Wilsonia canadensis (Linn.). Canadian Warbler. 



Muscicapa canadensis. Setophaga canadensis. Myiodioctes canadensis. 

 Sylvania canadensis. Sylvia pardalina. Muscicapa bonapartei (young in 

 autumn). Myiodioctes bonapartei. Sylvania bonapartei. Canada Fly- 

 catching Warbler. 



Geog. Dist. — Eastern North America; north to Newfound- 

 land, southern Labrador, Hudson Bay, Saskatchewan, Atha- 

 basca and Alberta. Breeds from the mountains of North Caro- 

 lina, the higher parts of New York and New England, southern 

 Ontario, central Michigan, central Wisconsin and central Minne- 

 sota northward. Migrates through the wooded districts of 

 the eastern United States, southern Texas, and eastern Mexico 

 and Central America to winter in Ecuador and Peru, 6000 

 miles from their most northern breeding grounds. 



