38 



Several other ^specimens of corresponding ages agree closely with the one 

 above described. A male, however (Cambridge, August 9, 1875), differs 

 in having a faint reddish wash over the white on the breast and abdomen. 

 This species, as previously stated, passes through a regular first plumage, 

 which precedes the downy stage, and is in turn succeeded by the regular 

 autumnal plumage. The first moult occurs in the latter part of August. 

 The autumnal plumage is a little brighter than that of the adult in spring, 

 but does not otherwise materially differ. 



119. Porzana Carolina. 



Downy stage : chick a few days old. Bill short, exceedingly depressed, 

 high at base, rapidly tapering, the tip deflected. The whole body densely 

 covered with dull black down, beyond which are produced abundant long, 

 glossy, black hair-like filaments. Upon the throat is a tuft of stiff, coarse, 

 bristle-like feathers of a bright orange-color. These are directed forward, 

 and give the bird a most singular appearance. From a specimen in my 

 cabinet collected at Cambridge, Mass., June 24, 1874. This bird, although 

 the only specimen of the kind now at hand, is one of a large brood which 

 was attended by the female parent. Several of the others were distinctly 

 seen and closely examined at the time.. All had a similar orange tufl 

 upon the throat. 



Notwithstanding the close relationship of this species to the preceding 

 one, I am inclined to think that it has no distinctive first plumage, and 

 that the down is worn until the feathers of the fall dress begin to appear. 

 Negative evidence tending to strengthen this belief is afforded by a good 

 number of specimens shot during the summer months. The autumnal 

 plumage is too well known to merit description. The plumage of the 

 adult varies but slightly at the different seasons. 



Supplementary. — Tachycineta bicolor. In my remarks upon the 

 development of the plumage of young birds of this species (Vol. Til, No. 

 2, p. 63), I stated that the first plumage was worn " much longer than in 

 most birds." From investigation of material collected during the past 

 season, I find that the change takes place from about the middle to the 

 last of September. Six specimens shot at Concord, Mass., October 16, 

 1878, have all acquired the full autumnal dress. The young differ from 

 the adults only in having an exceedingly faint brownish-ashy wash on 

 the breast and throat, and also in the shade of the metallic lustre of the 

 back, which is of a greener and less steely cast. Both adults and young 

 possess the conspicuous white tipping on the secondaries. 



Under the head of Coturniculus lienslowi (Vol. Ill, No. 3, p. 1 ] 8), I made 

 the generalization that, " with the single exception of Chry.iomitris trhtis, 

 this is the only species of the FringUliilm, so far as I am aware, in which 

 the young in first plumage are entirely immaculate beneath." That state- 



