DELAWARE VALLEY ORNITHOLOGICAL CLUB. 19 



served at Tamarack Swamp, but one of the characteristic birds 

 of the primeval forest region between Oleona and New Bergen. 

 Here it was very common and evidently had young. A brood 

 of three young birds, hardly able to fly, was found along the 

 same beautiful little mountain divide where the Water Thrush 

 was observed, but such a diligent search as the swarms of 

 '"black-flies" would permit, failed to reveal the nest. As a 

 rule, however, this species seemed to be more abundant in the 

 underbrush bordering the well-traveled road between Oleona 

 and New Bergen than a few hundred yards back in the midst 

 of the primeval forest. 



62. Geothlypis trichas. Maryland Yellow-throat. — Very com- 

 mon everywhere, both in the clearings and in the deep woodland. 



63. Icteria virens. Yellow-breasted Chat. — The unmistakable 

 notes of this bird were plainly heard on a partially cleared hill- 

 eide near the town of Galeton, Potter county, on June 22, 1900. 

 They seemed hardly in keeping with the mountainous surround- 

 ings, and yet after all it is entirely natural that this species, 

 which is generally regarded as typical of tlie Carolinian fauna, 

 should gradually find its way northward, as the topography of 

 the country is rapidly changed by the removal of the original 

 forest — evidence of the very close connection between the fauna 

 and flora of a locality, rather than between the fauna and mere 

 latitude: It may be of interest to note the occurrence of this 

 species in recent years during the breeding season at Harvey's 

 Lake, June, 1891 (Stone); at Lopez, North Mountain, June 18, 

 1898 (Stone), and finally at Dimock, Susquehanna countj', June 

 28, 1900. In the last case the birds remained in the same locality 

 all summer, and undoubtedly bred there, as they probably did 

 also at Harvey's Lake and at North Mountain. Furthermore, 

 in all these instances, while the Chats were confined to open clear- 

 ings, one had but to go a few hundred feet to where the primeval 

 forest, with its more or less boreal flora, still remained uncut, in 

 order to find most of the typical northern Warblers. A clearer 

 example of the strong influence of environment on our bird Ufe 

 could hardly be found. 



64. Wilsonia canadensis. Canadian Warbler. — Of all the 

 warblers noted during our trip, I am inclined to think that this 



