188 DWIGHT 



3. FIRST WINTER PLUMAGE acquired by a partial postjuvenal 

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

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

 tail. Young and old become practically indistinguishable, the 

 young usually with more buff tints. 



Similar to A. princeps, but dark brown 'instead of gray prevailing above, the crown, 

 back and wing edgings much darker. Below with more buff on the throat and 

 about the head, the streakings decidedly broader and blacker. 



4. FIRST NUPTIAL PLUMAGE acquired by a partial prenuptial 

 moult in March and April which involves the head, throat, 

 breast, often the anterior part of the back, the tertiaries and stray 

 feathers elsewhere even on the thighs, the abdomen, the lumbar 

 tracts and the tail coverts, but not the remiges nor rectrices. The 

 bufify winter tints are replaced by grayish ones and the yellow of 

 the superciliary line is acquired. Wear is soon marked. 



5. ADULT WINTER PLUMAGE acquired by a complete post- 

 nuptial moult in August. Differs little from first winter plum- 

 age, the buffiness less pronounced and the tertiary edgings a 

 deeper brown. Superciliary line sometimes tinged with yellow. 



6. ADULT NUPTIAL PLUMAGE acquired by a partial prenup- 

 tial moult as in the young bird. 



Female. The sexes are practically indistinguishable, although 

 usually, the yellow of the superciliary line is less bright in the 

 female and there is more buffy suffusion. 



Ammodramus savannarum passerinus (Wils.). 

 GRASSHOPPER SPARROW 



1. NATAL DOWN. No specimen seen. 



2. JUVENAL PLUMAGE acquired by a complete postnatal moult. 



Above, mottled and streaked with olive-brown, the edgings of the nape and median 

 crown stripe grayish, those of the back and rump buffy, the scapularies tipped 

 with spots of russet. Wings and tail olive-brown, edged with wood-brown or 

 pale cinnamon, the wing coverts and tertiaries tipped with white. The central 

 rectrices have a peculiar fused barring along the shafts. Below, white, streaked 

 across the jugulum and faintly on the sides with olive-brown. Edge of wing 

 white or faintly yellow. Bill and feet pinkish buff, the former becoming dusky, 

 the latter deep brown when' older, and dull ochre-yellow in dried skins. 

 (Plate II, fig. 1, shows a new tertiary of this plumage.) 



