Bendire.] 114 [March 21, 



23. Dendroica nigrescens (Baird). Black-tliroated Gray 



Warbler. 



Observed on several occasions near the summit of the Canyon 

 City mountain during the early part of the summer of 1876. 



24. Dendroica townsendi (Baird). Townsend's Warbler. 

 Rare, a specimen obtained May 11, 1875. I took a nest and three 



eggs June 7, 1875, which, I believe, belongs to this species. It was 

 very neatly constructed of rotten plant fibres, roots, and lined with 

 very fine rootlets, a little hair and down from cottonwood seeds. The 

 nest was placed in a narrow ravine near the head of Rattlesnake 

 Creek, amongst several small willow shoots near the main stem, and 

 about four feet from the ground. The specimen shot was obtained in 

 the same neighborhood, but I failed to secure the parent of the eggs, 

 although I saw the birds several times. They were moving constantly 

 in the densest undergrowth, and it was difficult to shoot them. The 

 eggs are pyriform in shape, pinkish white, with spots of light brown 

 and lavender, and dark amber, principally around the larger end. 

 Measurement, .62 X .50, .60 X .50, .61 X -51 of an inch. They do 

 not resemble any other warbler's eggs in my collection. 



25. Geothlypis macgillivrayi (Baird). Macgillivray's 

 Ground Warbler. 



A common summer resident, breeds. It arrives here about May 1, 

 and frequents the thickest undergrowth along the creek bottoms. A 

 nest containing four eggs was taken June 15, 1875. It had been 

 placed between several steins of a wild rosebush about an inch from 

 the ground, on a layer of dead leaves. Measurements of eggs, .71 X 

 .52, .70 X -54, .74 X -51 and .70 X -50. 



26. Icteria virens var. longicauda (Lawrence). Long- 

 tailed Chat. 



A rare summer resident in the vicinity of Camp Harney ; arrives 

 about May 15. A single set of eggs of this species I found June 

 5, 1876. Eggs of this species collected near Ft. Lapwai, Idaho, are. 

 nearly as large again as many taken in the vicinity of Tucson, A. T. 



27. Petrochelidon lunifrons (Baird). Cliff Swallow. 



One of the most abundant summer residents in this section of 

 country. Their nests can be seen on almost any of the numerous 

 perpendicular cliffs in this vicinity. Many of them bre'ed under the 

 eaves of the buildings of the post. They arrive about the com- 

 mencement of May, and leave about the middle of August. 





