OF ARTS AND SCIENCES 8 1 



ent individuals were observed between September 4 and 23. On 

 the first date one was seen high on the Jefferson Notch road at 

 nearly 2500 feet elevation, moving down through the roadside 

 growth with a Bay-breasted Warbler as one of its companions. 

 The others were seen as usual in the valley or on the Highland. 

 In 1910 two were observed as early as August 29 in the vicinity 

 of Cherry Pond, two others the following day in a grove of birches 

 in the valley bottom, and other individuals up to September 27, 

 twelve birds in all. 



138. Vireosylva gilva gilva. Warbung Vireo. 



Possibly a rare summer resident in Jefferson, but a common 

 summer resident in the village of I^ancaster. In 1902, a pair 

 may have nested in Jefferson, the song having been heard in 

 the early days of June midway between the Highland and the 

 Hill. In 1903, three male birds sang in the roadside trees on 

 the Hill in the last days of May and early days of June, and the 

 song continued to be heard to the end of the month. In no 

 succeeding >ear has the song been heard within the town limits. 

 From the street elms in Lancaster, however, especially within 

 the village, a dozen to twenty voices have been recorded on the 

 same day. The song has seldom been heard after the earl}- 

 days of July. 



139. Lanivireo flavifrons. Yeli^ow-throated Vireo. 



I am informed by Mr. Spaulding that a pair undoubtedly 

 nested in Lancaster in the summer of 19 10. One or both birds 

 were first seen by Mr. F. H. Kennard and Mr. F. B. McKechnie 

 on June 15 in a grove just outside of the village limits. Three 

 days later Mr. Lewis Childs in company with Mr. Spaulding 

 saw the birds and observed the female gathering nesting mate- 

 rial. The nest was not located. Mr. Spaulding heard the male 

 bird singing on several occasions. This is the first occurrence, 

 so far as known, of the Yellow-throated Vireo in the Jefferson- 

 Lancaster region, and in this case it was probably breeding. 



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