242 DWIGHT 



Below, dull white, washed on the throat and sides with wood-brown, obscurely 

 streaked, on throat, breast, sides and crissum with dull grayish black. Bill and 

 feet pinkish buff, becoming dusky with age. 



3. FIRST WINTER PLUMAGE acquired by a partial postjuvenal 

 moult beginning early in July which involves the body plumage 

 and the wing coverts but not the rest of the wings nor the tail. 



Similar to previous plumage but whiter and definitely streaked. Above, striped in 

 black and white, the upper tail coverts black broadly edged with white ; median 

 crown and superciliary stripe pure white. The wing bands white. Below, pure 

 white streaked with bluish black on sides of breast, flanks and crissum, the 

 black veiled by overlapping white edgings ; the chin, throat, breast and ab- 

 domen unmarked.. Postocular stripe black ; the white feathers of the sides of 

 the head tipped with black. 



4. FIRST NUPTIAL PLUMAGE acquired by a partial prenuptial 

 moult which involves a large part of the body plumage except 

 posteriorly, but not the wings nor the tail. The black streaks of 

 the chin and throat are acquired, veiled with white, and the 

 loral, subocular and auricular regions become jet-black. The 

 brown primaiy coverts distinguish young birds and the chin is 

 less often solidly black than in adults. 



5. ADULT WINTER PLUMAGE acquired by a complete post- 

 nuptial moult beginning the first of July. Differs from first winter 

 dress in having the chin and throat heavily streaked with irreg- 

 ular chains of black spots veiled with white edgings, the wings 

 and tail blacker and the edgings a brighter gray. 



6. ADULT NUPTIAL PLUMAGE acquired by a partial prenuptial 

 moult as in the young bird from which the blacker primary cov- 

 erts and sometimes solidly black chin will serve to distinguish it. 

 A specimen (Am. Mus. Nat. Hist.,. No. 50374, February i8th, 

 Tehuantepec, Mexico), evidently an adult, shows renewal on the 

 chin ; also an undated bird (Am. Mus., No. 39634, Yucatan). 



Female. The female has corresponding plumages and moults, 

 the first prenuptial moult often very limited or suppressed. In 

 juvenal dress the wings and tail are usually browner with duller 

 edgings and the streaking below obscure. In first winter plu- 

 mage the streakings are dull and obscure everywhere, a brown 

 wash conspicuous on the flanks and sides of the throat. The 

 first nuptial plumage is gained chiefly by wear through which 



