36 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



ee. Wing averaging 84 in male, 81 in female; coloration paler and grayer. 

 (Breeding in coast district of California; south in winter to Santa 

 Margarita Island, Arizona, and Sonora.) 



Hylocichla guttata sleveni (p. 44) 

 dd. Larger (wing averaging more than 90). (Coloration of H. g. sleveni or inter- 

 mediate ])etween that and //. g. guttata.) 

 e. Smaller (adult male averaging, wing 92.8, tail 71.8, exposed culmen 13.5, 

 tarsus 28.4; adult female, wing 90.1, tail 67.7, exposed cidmen 13.5, 

 tarsus 28.6). (Breeding on Sierra Nevada and Cascade ranges and 

 northward to Yukon River, Northwest Territory; migrating southward 

 and eastward to Lower California, northern Mexico, Texas, and Wyo- 

 ming.) Hylocichla guttata sequoiensis (p. 44) 



ee. Larger (adult male averaging, wing 102.4, tail 75, exposed culmen 15.1, 

 tarsus 30.1; adult female, wing 99.4, tail 73.2, exposed culmen 14.4, 

 tarsus 29.5). (Breeding in Rocky Mountain ranges of LTnited States 

 and British Columbia; south in winter over Mexico to highlands of 



Guatemala.) Hylocichla guttata auduboni (p. 46) 



cc. Sides and flanks brown or buffy brown; color of back, etc., more buffy brown 

 or isabelline; bill relatively larger and stouter; tail relatively shorter; feet 

 relatively larger. (Breeding in British Provinces and northern United 

 States east of Rocky Mountains; in winter south to Florida and Texas.). 



Hylocichla guttata pallasii (p. 48) 

 hh. Outermost (spurious) primary much shorter than primary coverts; ninth prim- 

 ary much longer than sixth; tail and upper tail-coverts concolor with back, 

 c. A conspicuous orl)ital ring of buff; only two primaries (eighth and seventh) 

 with outer wel) sinuated; tail not longer than distance from bend of wing to 

 end of secondaries. (Hylocichla ustulata.) 

 d. Olive-brown above; spots on chest smaller or narrower, usually more l)ruwn- 

 ish. (Pacihc coast district, l)reeding from northern Lower California to 

 southern Alaska; in winter southward through Mexico and Central America 



to Ecuador. ) Hylocichla ustulata ustulata ( p. 52) 



dd. Olive or grayish olive al)OA'e; vspots on chest larger or broader, more black- 

 ish. (North America except Pacific coast district; south in winter 

 through Mexico and Central America to Colombia.) 



Hylocichla ustulata swainsonii (p. 55) 

 cc. No orbital ring; three primaries (eighth, seventh, and sixth) with outer web 

 sinuated; tail decidedly longer than distance from bend of wing to end of 

 secondaries. 

 d. Middle toe (without claw) three-fifths as long as tarsus; tail two and a half 

 times as long as tarsus; upper parts grayish brown or olive; spots on chest 

 larger, blackish. {Hylocichla alidx.) 

 e. Larger (male averaging, wing 104, tail 73; female, wing 100, tail 67.7); color 

 of upper parts grayer or clearer olive. (Northern and eastern North 

 America, breeding from Labrador to Alaska; .«outh in winter to Peru). 



Hylocichla aliciae aliciae (p. 59) 

 ec. Smaller (male averaging, wing 92.1, tail 66.5; female, wing 88.6, tail 64.2); 

 color of upper parts darker and browner. (Breeding on mountains of 

 northeastern New York, New Hampshire, etc.; during migration south- 

 ward to South Carolina, Illinois, etc.) . . Hylocichla alicise bicknelli (p. 62) 

 dd. Middle toe (without claw) less than three-fifths as long as tarsus; tail more 

 than two and a half times as long as tarsus; above tawny brown; spots on 

 chest smaller, narrower, brownish. {Hylocichla fuscescens.) 

 e. Coloration brighter or clearer, the upper parts more decidedly tawny; streaks 

 on chest usually lighter brown. (Eastern temperate North America.) 



Hylocichla fuscescens fuscescens (p. 64) 

 ee. Coloration duller, the upper parts browner; streaks on chest usually darker 

 brown. (Western United States and British Columbia.) 



Hylocichla fuscescens salicicola (ji. 67) 



