Artificial Key 29 



Under parts greenish yellow ; tail of moderate length. 

 Scarlet Tanager, Female and Male in Fall Plu- 

 mage, (p. 95.) 



108. Large white spots on outer tail feathers, the largest ones 



nearly an inch long; beak largely yellow. Yellow- 

 billed Cuckoo, Either Sex. (p. 151.) 

 Small white spots on tail about one-fourth of an inch 

 long; beak almost entirely black. Black-billed 

 Cuckoo, Either Sex. (p. 150.) 



109. Birds in the habit of carrying the tail cocked; very small. 



Go to 110. 



Birds not in the habit of carrying the tail cocked ; not 

 very small. Go to 112. 



110. Back with a patch of mottled black and white; birds 



usually found in swampy places. Marsh Wrens. 

 Go to 111. 



Back without a patch of mottled black and white; bird 

 not found especially in wet places. Go to 90. 



111. Bill half an inch long or more. Long-billed Marsh 



Wren, Either Sex. (p. 57.) 



Bill from one-third to two-fifths of an inch long. Short- 

 billed Marsh Wren. (p. 58.) 



112. Back mottled. Go to 113. 

 Back not mottled. Go to 118. 



113. Back and breast yellowish gray; two white bars on 



wing; white spots on outer tail feathers. Pine 

 Warbler, Female, (p. 73.) 



Back mottled in shades of bay, brown, and black. Go 

 to 114. 



