S8Q NESTS AND EGGS OF 



in Mr. Norris' collection the sizes of the set containing the smallest 

 eggs are, .66 x .51, .69 x .52, .68 x .53, .69 x .52 ; the largest, .75 x .53, .73 

 X .54, .72 x .53, .JT, x .55 ; the average is .70 x .53. 



685. Sylvania pusilla. (VVils.) [125.] 



Wilson's Warbler. 



Hab. Eastern North America, west to and including the Rocky Mountains, and to the coast of Behring 

 Sea. Breeds from northern border of United States and higher Rocky Mountains northward. South in 

 ■winter through Eastern Mexico and Central America. 



The Green Black-capped Flycatching Warbler, or Wilson's Black- 

 capped Warbler, breeds from the northern border of the United 

 States northward, chiefly however in the higher latitudes. Mr. H. D. 

 Minot found a nest of this bird containing five fresh eggs, on June 22, 

 at Seven Lakes, on Pike's Peak, Colorado. The nest was found on 

 the ground, under a low, spreading branch of a dwarf willow, at the 

 edge of a swamp. ^ 



The eggs of this species are four or five, sometimes six in number. 

 A set of five in Mr. Norris' cabinet was taken June 15, 1887, in Boul- 

 der county, Colorado. The nest was well imbedded in the ground 

 among some willow twigs, and was composed of leaves and swamp 

 grass externally, lined with fine grasses and a few hairs. The eggs 

 are white, speckled with cinnamon-rufous and lavender-gray, Nearly 

 all the markings are near the larger ends, where they form wreaths. 

 Their respective measurements are .59X.49, .60X.49, .60x48, .58X.48, 

 j6o X .48. 



685a. Sylvania pusilla pileolata. (Pall.) [125^.] 



Pileolated Warbler. 



Hab. Western North America, chiefly along or near Pacific coast, north to Kadiak Island, Alaska. 

 South in Winter through Western Mexico to Costa Rica. 



The Western Black-capped Flycatching Warbler is a common 

 breeding bird in various sections on the Pacific coast from Southern 

 California northward. Mr. W. Otto Emerson states that in the vicinity 

 of Hay wards, California, he has taken eggs as early as April 22, and 

 full-fledged young were observed by May 17. The birds nest in the 

 thickets along water courses, and rear at least two broods in a season. 

 Prof. Evermann found a nest near San Buenaventura, California, on 

 May 23, 1881, placed about a foot from the ground, in a clump of 

 blackberry bushes. Dr. Merrill notes that the bird breeds in consid- 

 erable numbers in the swampy willow thickets along Wood River and 

 Fort Creek, in the region of Fort Klamath, Oregon. The nest is 

 composed of leaves, bark strips, weed stems, vegetable fibres, rootlets, 

 lined with finer grasses. Often it is made entirely of leaves and lined 



* See foot-note in New England Bird Life, Vol. I, pp. 172-173. 



