560 bulletin: museum of comparative zoology. 



38. Iridoprocne bicolor (Vieillot). 

 Tree Swallow. 



Five adults of both sexes from Nieholsville, July 5th to Julj^ 21st. 



Tree Swallows were found breeding in the immediate vicinity of 

 Nieholsville. When the young were out of the nests, both young and 

 old would perch on a telegraph wire overhanging the Upper Humber. 

 It was only at this point that large flocks were observed. 



39. Mniotilta varia (Linne). 

 Black and White Warbler. 



Two adult males and an adult female from Deer Lake, Nieholsville, 

 and Lewis Hills, June 30th to August 24th. 



The Black and White Warblers of Newfoundland are apparently 

 darker than New England breeding birds. The white areas are 

 narrower and the black ones broader. But, again, this darkness is 

 not always a constant feature, since some of the New England speci- 

 mens are nearly identical, or at least fall within the range of our 

 small series. 



Other birds of this species were observed at Nieholsville, July 2nd 

 to 10th. This bird was not abundant in the region traversed. 



40. Dendroica aestiva amnicola Batchelder. 

 Newfoundland Yellow Warbler. 



Four adult specimens from Deer Lake, Nichols\'ille, and Lewis 

 Hills, July 3rd to August 25th. 



This well-marked subspecies was found in a somewhat different 

 habitat than D. a. aestiva (Gmelin) of Nova Scotia. Instead of fre- 

 quenting the bushy brooksides, as its subspecific name would imply, 

 the bird seemed to prefer the tall stands of deciduous trees. I 

 became very familiar with this Warbler in the woods on the north side 

 of Deer Lake, but I did not meet with it at all around any of the 

 many bushy swamps which extend over so much of Newfoundland. 



