586 Annals of the Carnegie Museum. 



pair seemed to be settled here for the season, the species is known to 

 migrate so late that further data are requisite to decide its exact sea- 

 sonal status. In the fall it was observed by us on August 22 and 23, 

 and Mr. Simpson reported it in September, as well as in September 

 of 1902. Mr. Bacon's only specimen was taken May n, 1894. 



207. Geothlypis agilis. Connecticut Warbler. 



One of the rare transient visitants, bringing up the rear of the 

 warbler migration in the spring. A bird believed to have been of 

 this species was heard singing in thick undergrowth May 22, 1900, 

 but eluded capture. A specimen was taken in some low brush along 

 the marsh near the western end of the bay on May 25, its song having 

 first attracted attention. May 29 a third individual was met with in a 

 dense growth of bushes along the board-walk, but successfully evaded 

 an attempt at capture which lasted almost two hours, keeping so well 

 concealed that we got but one or two glimpses of it, although within 

 only a few feet, as evidenced by its singing. The song of this warbler 

 is quite loud and clear, and bears a striking resemblance to those of 

 the Mourning and Kentucky Warblers, but has a peculiar explosive 

 quality heard to some extent in the notes of the Canadian Warbler and 

 Water-thrush. It is susceptible of three or four variations, but per- 

 fectly distinctive. There are two fall records : a specimen taken at 

 the head of Niagara Pond September 21, and a single bird noted in the 

 bushes along Ridge Pond September 24. Dr. Warren speaks of 

 having taken the species here in September, and that Mr. Sennett 

 considers it an uncommon migrant {Birds of Pennsylvania, 1890, 

 297). 



208. Geothlypis Philadelphia. Mourning Warbler. 



Occurs as a rare migrant, detected in the spring only. One was 

 noted in the thick woods west of Graveyard Pond on May 22, 1900, 

 but eluded capture. Mr. Sennett' s collection contains one female, 

 shot on the Peninsula June 4, 1875 — a ^ ate spring record. 



209. Geothlypis trichas brachidactyla. Northern Yellow-throat. 

 An abundant summer resident on the Peninsula, where it is a char- 

 acteristic inhabitant of the bushes and shrubbery surrounding the 

 ponds, and it is noted also on the mainland. May 4 was the date of 

 its vernal appearance in 1900, and by May 14 it had become common. 

 It was particularly numerous and conspicuous in the fall, in August 

 and September, leaving by September 27, although a single stray 



