424 



BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



19.30 (18. 8(^); hind claw, 8.89-9.01 (9.65); extent of white on outer 

 tail-feather, ^B.BT-aihB^ (33.0:^).' 



Yo^i7ig male. — Abov^e dull fulyous-brown, darker and uniform on 

 head, elsewhere indistinctl}" streaked with dusky; wing's dull black, 

 the coverts edo-ed with buHy brown and tipped (on outer web) with 

 paler liutiy; tertials with a broad lateral stripe of butfy whitish (passing 

 into fulvous on outer edge) on the terminal portion of the outer web, 

 this light-colored marking occupying greater portion of exposed por- 

 tion of outer web on innermost feather; primaries marked with white, 

 as in the adult; tail as in adult male, the white terminal patch on 

 outermost rectrix about 33 mm. long; chin and throat plain pale ])uli', 

 with an interrupted blackish stripe on each side; chest deeper buff, 

 thickly marked with cuneate and sagittate streaks of dusky; sides dull 

 fulvous, sparsel}^ streaked with dusky; breast and belly dull white; 

 flanks, anal region, and under tail-coverts buff'y. 



Young female. — Essentially like the 3"oung male, but the black por- 

 tions of wings and tail replaced by rich, warm brown, the streaks on 

 chest more linear, bolder, and brown instead of blackish; no black on 

 sides of chin. 



[The nestling plumage of both sexes is immediately succeeded, 

 thi-ough the autumnal molt, by the adult plumage; and birds in their 

 iirst winter are practically undistinguishable from older individuals.] 



Eastern United States and more southern British provinces; west 

 to edge of the Great Plains, in Manitoba (Big Plain, Red River Valley, 

 Selkirk Settlement, Carberry, etc., breeding). North Dakota (Pem- 

 bina, etc., breeding), Kansas, Indian Territory, etc.; breeding from 

 near the Gulf coast (Georgia to Louisiana), north to Maine (Oxford, 



^ Thirteen specimens. 



Specimens from opposite sides of the Alleghenies differ but slightly in average 

 measurements and, so far as I am able to see, not at all in color. Average measure- 

 ments of two series are as follows: 



Locality. 



MALES. 



Nine adult males from east of 

 .\lleghenies 



Eight adult males from Mississippi 

 Valley 



FEMALES. 



Seven adult females from east of 

 Alleghenies 



Six adult females from Mississippi 

 Vallev 



Wing. 



89. 92 

 89. 15 



81.03 

 80.77 



Tail. 



94.7-1 

 93. 73 



Ex- 

 posed 



e>il- 

 men. 



Depth 

 of bill 

 atbagfe. 



14.22 1 11.18 

 13.97 i 11.18 



S.'S.Sf) 13.97 10.67 

 SO. 3t) j 13. 4t! 10.92 



28.45 

 28. 45 



26. 92 

 27. 18 



Middle 

 toe. 



19.81 

 19. 56 



18. 80 

 18. 80 



Hind 



claw 



(chord) 



9. 65 

 10.16 



9.40 

 9. 65 



40.64 

 38.35 



,34. 29 

 31.24 



