382 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 
Downy young.—General color very pale buffy gray or dull grayish 
white, becoming more decidely white on under parts of body; a 
small spot in center of anterior portion of forehead, a loral streak, 
and a.stripe on each side of occiput dull black; crown and occiput deep 
grayish brown, margined laterally with dull black, the black lateral 
stripes uniting posteriorly and extending as a single stripe down 
median portion of nape; hindneck deep grayish brown intermixed 
laterally with very fine filamentous streaks of dull ‘whitish; lower 
back and rump with a broad median stripe of dark grayish brown or 
fuscous and two narrower lateral stripes of pale brownish gray, be- 
neath which is a broad stripe of grayish brown; outer side of thighs 
deep grayish brown. 
Adult male.—Wing, 180-198.5 (187.8); tail, 71-83 (76.9); exposed 
culmen, 52-61 (55.8); tarsus, 57-68 (60.7); middle toe, 32.5-40.5 
(35.5). # 
Adult female.-—Wing, 180-197 (188.9); tail, 71-83 (76.6); exposed 
culmen, 53.5-58 (55.5); tarsus, 55-62.5 (59.4); middle toe, 33-37.5 
(34.8).° 
Breeding from Anticosti, Magdalen, and Mingan islands in Gulf 
of St. Lawrence, Newfoundland, Labrador, étc., to southern Macken- 
zie, Cook Inlet, Alaska (Mount Iliamna), eal southern British 
Columbia (formerly southward to northern Minnesota and Cook 
County, northeastern Illinois?); migrating southward over whole of 
United States, Middle America (including Bermudas and West 
Indies), and South America, as far as Patagonia (Straits of Magellan) 
and Chile (Antofagasta; Rio Pilmaguén; Sitana, Tarapacd; Tel- 
cahuano; Santiago; Valparaiso); not yet recorded from Galapagos 
Archipelago; accidental in western Europe (Tresco Abbey, Scilla 
Island, Sept. 16, 1906). 
«@ Twenty specimens. b Eleven specimens. 
‘ ; Ex. Middle 
Loeality. Wing. | Tail. | posed | Tarsus.| “+5. 
culmen 
MALES, 
Ten adult males from eastern North America 190.8] 785) 56.5] 624} 366 
Ten adult males from western North America. ..............-- 184.7] 75.4] 545] 59 34.3 
FEMALES, 
Six adult females from eastern North America (South Carolina, ’ 
MLCT ANS) 2 siseracaseceaesaeminiund sowuldomenGaaraeenmnmenaons 187.4] 77.1] 55.5] 59.9 35.7 
Five adult females from western North America............... 190.6 | "76.1 55.5 58.9 33.7 
A sufficient series of specimens may possibly show differences in coloration between 
eastern and western birds of this species. Some late spring adults of the latter have 
much more white spotting on the upper parts (the black spotting being thereby 
rendered more conspicuous) and the under parts more extensively marked with 
dusky. 
