abdomen, and orissum. From specimen in my collection shot at Upton, 

 Me., May 31, 1871. 



Adult female. With black of head scarcely duller than in the male : 

 beneath similar, perhaps a trifle less rusty. From specimen in my col- 

 lection obtained on Muskeget Island, Mass., June 30, 1870. It is very 

 possible that this bird represents a development of plumage only excep- 

 tionally attained by the female ; I have seen no other specimen of that 

 sex with the color of the crown so nearly approaching that of the male. 



Autwmnal plumage of young : male. Upper parts as in breeding adults, 

 the ash-blue a little clearer and brighter. Chin white ; rest of under 

 parts brownish-rusty, paler on throat and intensifying into light chestnut 

 on sides. A narrow line down centre of abdomen pure white (this last 

 feature, though characteristic of most specimens, is wanting in a few). 

 From a specimen in my collection shot at Upton, Me., September 7, 1874. 



Female. Pileum dark ashy mixed with black. Otherwise similar to 

 male and scarcely lighter beneath. From specimen in my collectjon shot 

 at Upton, Me., September 12, 1874. 



The adult in autumn is paler beneath than the young. 



15. Thryothorua ludovlcianus. 



First plwmage : male. Top of head dark rusty, each feather edged and 

 tipped broadly with dull black, the former color nearly eliminated by the 

 latter on the crown and forehead. Under parts nearly as in adult, but 

 more cinnamoneous ; a few narrow, wavy, and somewhat badly defined 

 transverse lines of black across the breast and abdomen. From a speci- 

 men in my collection shot at Petroleum, West Va., May 1, 1874. 



16. Troglodytes aedon. 



First plumage : female. Upper parts more reddish than in adult : 

 throat, jugulum, and breast pale fulvous-white, each feather on breast 

 tipped with pale drab, giving that part of the plumage a delicately sou- 

 tellate appearance. Abdomen whitish ; sides, anal region, and crissum. 

 dull rusty-brown, becoming almost chestnut on the crissum. No trace 

 of bars on feathers of the body either above or beneath. From specimen 

 in my collection shot at Cambridge, Mass., July 9, 1873. 



17. Troglodytes parvulus var. hyemsilis. 

 First plumage : mal^. Remiges, rectrices, etc., as in adult ; rest of 

 upper parts dark reddish-brown, becoming more dusky anteriorly : no 

 trace of bars except on wings and tail. Beneath dull smoky-brown, 

 with a strong ferruginous suffusion on sides, anal region, and crissum ; 

 every feather of imder parts with a bar of dark brown. From a specimen 

 in my collection taken at Upton, Me., August 4, 1874. 



18. Telmatodytes palustris. 



First plumage ; female. Entire pileum, nape, and interscapular region 

 dull black ; no white streaking or spots ; otherwise like adult. From 

 specimen in my collection taken at Cambridge, August 10, 1873. 



