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front side immediately above the floor. The walls varied from 

 one to two inches in thickness, forming a neat spherical cavity 

 as yet unoccupied, June 24. 



A nest of Wilson's warbler, Sylvania pusilla (Wils.), was 

 taken on June 24, in the vicinity of McDonald Lake. It was 

 found under the projecting shelter of a moss-covered, decayed 

 prostrate log in a dense arbor-vitae swamp-woods. The brim 

 was flush with the surroundings in decayed leaves, moss, and 

 punk. The walls were made of coarse weed fibers, and the 

 lining was a scanty layer of reddish-brown fibers and horse- 

 hair. The cavity measured two inches in diameter, and one 

 and one-fourth inches in depth. There were four eggs, incuba- 

 tion quite advanced, and one egg was broken in blowing. The 

 female was startled from her cozy home as I stepped over the 

 log almost over the nest. In size and appearance, the eggs 

 closely resemble those of the chickadee, having a whitish ground 

 irregularly marked with fine specks of thin reddish-brown, the 

 markings being thickest at the larger end. 



On June 29, a nest of western yellowthroat, Geothlypis trichas 

 occidentallis Brewst., was taken on a mountain-side near Flat- 

 head Lake, at an elevation of 5,000 feet. It was in the base 

 of a low bush, eight inches from the ground. It was made 

 entirely of coarse weed-stems, with a lining of horsehair. The 

 cavity was one and five-eighths inches across, and one and 

 three-eighths inches deep. There were four fresh eggs, which 

 had a pinkish white ground, with irregular dots and blotches 

 of thin reddish-brown. Besides this nest, several others of the 

 year were found, one in Daphnia Pond in a tuft of rushes 

 being made of coarse rush blades, with a scanty layer of fine 

 stems for lining. 



Macgillivray's warbler was noted more frequently than in 

 1900, though no nests with eggs were taken. On June 30, a 

 nest of this warbler was found in the base of a low bush in the 

 woods near Flathead Lake. It was eight inches from the 

 ground, made of coarse dried grasses and lined with horsehair. 

 The cavity was two and one-fourth inches in diameter, and 

 one and three-fourths inches in depth. I accidentally brushed 

 against the nest, which was filled with fledglings about ready 

 to fly, and they fluttered out quickly into the adjacent bushes, 

 entailing a great degree of chirping by the parents to collect 

 the scattered younglings. 



This year we were more fortunate in our search for the home 



