276 D\VIGHT 



4. FIRST NUPTIAL PLUMAGE acquired by marked wear, birds 

 becoming browner above and paler below, the veiling lost. It is 

 possible there is a very limited growth of new feathers about the 

 head, for the wear is disproportionately slight in some May 

 specimens when we consider the terrestrial habits of the species, 

 but the renewal hardly seems to deserve the name of a moult. 



5. ADULT WINTER PLUMAGE acquired by a complete post- 

 nuptial moult in July. Practically indistinguishable from first 

 winter, the streakings below rather broader, the wings and tail 

 deeper in color. 



6. ADULT NUPTIAL PLUMAGE acquired by wear as in the 

 young bird. 



Female. The sexes are alike and the moults correspond. 



Seiurus noveboracensis notabilis (Ridgw.). GRINNELL'S 

 WATER-THRUSH 



This darker subspecies has moults and plumages correspond- 

 ing to those of S. noveboracensis. 



Seiurus motacilla (Vieill.). LOUISIANA WATER-THRUSH 



1. NATAL DOWN. Deep olive-brown. 



2. JUVENAL PLUMAGE acquired by a complete postnatal moult. 



Above, deep olive-brown, without cinnamon edgings. Wings and tail darker, the 

 coverts faintly tipped with cinnamon. Conspicuous line above and behind the 

 eye dull white. Below, yellowish white, washed on the sides and crissum with 

 cinnamon and narrowly streaked on the chin, throat, breast and sides with dull 

 olive-brown. Bill and feet pinkish buff becoming dusky. 



3. FIRST WINTER PLUMAGE acquired by a partial postjuvenal 

 moult, beginning early in July, which involves the body plum- 

 age and the wing coverts but not the rest of the wings nor the 

 tail. 



Similar to the previous plumage. Above, deep olive-brown, much darker on the 

 crown, which is bordered by conspicuous white superciliary stripes. The wing 

 coverts are dark and without edgings. Below, white, buffy tinged and strongly 

 washed on sides of the throat, flanks and on crissum with ochraceous buff. 

 The chin is faintly flecked, the breast and sides streaked with olive-brown. 

 Lower eyelid white ; anteorbital spot and postocular streak dusky. 



