400 APPENDIX G 



and 27, and Nyarling River, July 8. The species was last seen 

 at Fort Resolution on July 16, when it was still in full song. 



Vireosylva gilva swainsoni (Baird). Western Warbling Vireo. 



The warbling vireo was first noted at Grand Rapid on the 

 Athabaska on May 22, and was noted at the same place on the 

 two following days. It was observed also at Smith Landing on 

 June 10, and at Fort Smith on June 15, 17, and July 3. We 

 last saw it on the lower part of Little Buffalo River on July 12. 



Lanivireo solitarius solitaritis (Wilson) . Blue-headed Vireo. 



This rather uncommon species was noted but once near Fort 

 Smith, where a specimen was taken on June 18. 



MniotUta varia (Linn.) . Black and White Warbler. 



Noted but once on the Athabaska, below Fort McKay, on 

 May 31. 



Vermivora celata celata (Say). Orange-crowned Warbler. 



A specimen of this warbler was taken at Smith Landing on 

 June 10. This was our only observation of the species. 



Vermivora peregrina (Wilson). Tennessee Warbler. 



This little warbler was collected at Fort Smith on June 15, 

 where it seemed to be much less common than during previous 

 summers. The species was next seen, and for the last time, on 

 Pike's Portage, near the eastern extremity of Great Slave Lake, 

 on July 28. 



Dendroica (estiva cestiva (Gmelin). Yellow Warbler. 



The yellow warbler was first observed on the Athabaska 

 River, near Fort McKay, on May 30. It was seen also at Fort 

 Smith, July 3, and on the lower part of Little Buffalo River on 

 July 12. While voyaging eastward among the islands of Great 

 Slave Lake, we saw the species near The Narrows on July 22, 

 and near Mountain Portage on July 24. Our last observation 

 of the bird, and the north-easternmost point of its occurrence, 



