382 BIRDS OF ONTARIO. 



the femah of this species, which has apparently subsided into the 

 Vjelief that in mature adult birds the sexes are nearly alike, but that 

 the female is longer in ac(juiring the black of the head and throat, 

 and is sometimes found with it imperfectly devel(>))ed or entirely 

 wantinj;. 



SYLYAXIA PUSILLA (Wils.). 

 -290. Wilson's Warbler. (6s.5) 



Clear yellow-olive; crown, glossy l>lue-black ; forehead, sides of head an<l 

 entire under parts, clear yellow ; wings and tail, plain, glossed with olive ; 

 upper mandil)le, dark; imder, pale; feet, brown. Female and i/oiiikj: — .Similar: 

 colors not so Ijright, the l)lack cap obscure. Small, 4f -."> : wing, about '1] : 

 tail, about 2. 



Hab. — Eastern North America, west to and including the Itocky Mountains, 

 north to Hudson's Bay Territory and Alaska. Breeds chiefly north of tlie 

 United States, migrating south to Eastern Mexico aiul Central America. 



Nest, a hollow in the ground, lined with fine grass and horsehair. 



Eggs, five, dull white, freckled with rusty-brown and lilac. 



Wilson's Fly-catcher passes through Southern ( )utari() on its way 

 to the north, in company with the Mourning Warblers aiul other 

 late migrants. Like some of the others, it has certain -resting places, 

 where it appears regularly in limited numbers every spring, but 

 strangers, unacquainted with its haunts, might ransack the country 

 for miles without seeing a single specimen. The greatest number go 

 far north to spend the summer, but it is probable that a few remain 

 in intermediate districts, for Mr. (Jeo. R. Wiiite found a pair nesting 

 in his garden in Ottawa. This is the onl}^ record of the kind I have 

 for Ontario. 



In "New England Bird Life," Part L, page 172, is an account of 

 a ne.st found by Mr. 1). H. Minot on Pike's Peak, 11,000 feet up, 

 near the timber line. The nest and eggs were as described above. 



Of its occurrence in Alaska, Mr. Nelson says: "On the Upper 

 Yukon its nests and eggs have been taken by the 20th of May, 

 and by the middle of that month its presence is noted on the coast 

 of Behring 8ea, where it is a summer resident, occupying the same 

 fdder thickets as the Yellow Warbler." 



