2. TtJEDUS. 185 



Key to the Species. 



A considerable number of spots on the nnder- 

 parts, especially on the throat, breast, and 

 flanks, one species ouly having the spots on 

 the flanks nearly obsolete. (Subgeueric group Tubdi.) 



(Na<:oTROPiCAL species.) 

 a. Tail olive-brown. 



a'. Spots on the breast and flanks crescentic 

 or •••eniilunar. 

 a". Second primary shorter than the 

 seventh, 

 a'". Upper parts olive-brown maranonicus, p. 188. 



(.Ethiopian species.) 



h'". Upper parts chocolate-brown lewsheri, p. 188. 



h". Second primary equal to or longer than 



the tiflh . . .' vlioaceofuscus, p. 189. 



v. Spots on the breast and flanks fan-shaped. 



(Pal^arctic species.) 

 c". Axillaries chestnut ; eye-stripe well- 



detined iliacus, p. 189. 



d". Axillaries rich bufi"; eye-stripe very 

 indistinct, 

 c'". Second primary shorter than the 



sixth auritus, p. 193. 



d'". Second primary longer than the fifth musicus, "p. 191. 

 e". Axillaries pure white ; eye-stripe obso- 

 lete viscivorus, p. 194. 



(Neabctic species.) 

 /". Axillaries dull bufl', suftused with 

 brown ; eye-stripe very indistinct. 

 e'". Upper parts olive-brown. 



a*. Ground-colour of chin, cheeks, and 



ear-coverts bufl" swainsoni, p. 201. 



b*. Ground-colour of chin, cheeks, and 



ear-coverts white alicies, p. 202. 



/'■'. Upper parts rufescent olive-brown. . tistulatus, p. 203. 

 (/". Axillaries brown, tipped and based 



with white musfelimis, p. 196. 



b. Tail russet-brown. 



c'. Upper parts uniform russet-brown. Spots 



on breast small i!hd pale fuscescens, p. 203. 



d'. Upper tail-coverts and tail russet-brown; 

 rest of upper parts olive-brown. Spots 

 on breast large and dark. 



h". Upper parts rufous olive-brown pctUasi, p. 199. 



i". Upper parts olive-brown. 



()'". Length of wing 4-25 to 3-70 inches . auduboni, p. 198. 

 /<"'. Length of wing 3-85 to 330 inches . aonalaschkce, p. 200. 



c. Tail black, sometimes sutiused with slate- 



(Neotropical species.) 



e'. Axillaries olive-brown dri/as, p. 204. 



(Palje.\rctic species.) 

 /'. Axillaries white pilaris, p. 205. 



