BIRDS OF NORTH AND MIDDLE AMERICA. 



29 



slaty; interscapulars with concealed basal portion extensively white; 

 under parts, including malar region, plain white (sometimes tinged 

 with buffy), passing into grayish on flanks; tibial feathers black 

 basally, extensively white terminally (the posterior side of thighs 

 sometimes uniform black) ; under tail-coverts black, often (irrespec- 

 tive of locality) tipped or barred with white, rarely mostly white 

 bill black; iris carmine red ; legs and feet dusky (bluish gray in life?) 

 length (skins), 179-205 (194); wing, 87-99 (92.1); tail, 64-79 (71) 

 culmen, 26-31.5 (28.5); tarsus, 33-37 (34.2); middle toe, 20-23.5 

 (21.3).« 



Adult female. — Above plain chestnut, darker on pileum, paler and 

 duller on rump, the tail and primaries more brownish chestnut; 

 loral and orbital regions dusky, passing into chestnut on auricular 

 region; under parts (including greater part of malar region) plain 

 white (sometimes tinged more or less with buffy), passing through 

 pale buffy grayish into pale buffy brown or cinnamon on flanks; 

 under tail-coverts light chestnut; thighs mixed light chestnut and 

 buffy whitish; bill varying from horn brown to nearly black; iris 

 carmine red; legs and feet horn color or dusky (bluish gray in life?) ; 

 length (skins), 169-220 (190); wing, 83-96 (89.4); tail, 64.5-75.5 

 (70.2); culmen, 25-30.5 (28.1); tarsus, 32-36.5 (34.2); middle toe, 

 20-23.5 (21.8).'' 



Immature male. — Similar to the adult male but wing-coverts with- 

 out white tips (the greater coverts sometimes narrowly ti])ped with 



o Forty-aeven specimens. 



b Thirty-six specimens. 



