CALAVERAS WARBLER 97 



Nest. — After stating that in Massachusetts the site selected 

 resembles that chosen by the Black and White Warbler, Bowles* adds : 

 "the material, however, is somewhat different, consisting of moss, dry 

 leaves, grass and pine-needles, and lined with pine-needles and grass, 

 instead of horse-hair, which is almost invariably used by Mniotilta. 

 Spaulding describes New Hampshire nests as made of moss and fine 

 grasses lined with rootlets, while nests found by Preston 2 in Minne- 

 sota were composed of the "soft stems of a slender Juncus and some 

 were lined "with deer's hair." 



Eggs. — 4 or 5. Ground color white to creamy white specked 

 and spotted with reddish brown and lilac of varying shades forming 

 a more or less distinct wreath about large end. This egg and that of 

 the Pileolated Warbler approach each other closely. Size; a typical 

 set of five measures .62x46, .63x46, .65x48, .62x47 and .63x46; 

 other specimens measure the same. (Figs. 23-25.) 



Nesting Dates. — New Haven, Conn., May 30- June 8 (Bishop) ; 

 Cambridge, Mass., full sets, first laying, May 25-June 1 (Brewster) ; 

 Lancaster, N. H., May 25-June 8 (Spaulding) ; Bangor, Maine, June 

 3- June 6; Fort Kent, Maine, July 10 (Knight) ; Detroit, Mich., May 

 30 (/. P. N.). 



Biographical References 



(1) J. P. N[orris], A Series of Eggs of the Nashville Warbler, Orn. and 

 061., XV, 1890, 23. (2) J. W. Preston, A Glimpse of the Nashville Warbler 

 [in Minn.], Orn. and Ool., XVI, 1891, 89. (3) C. H. Morrell, Nesting of 

 the Nashville Warbler [in Maine], Nidologist, III, 1896, 125. (4) J. H. Bowles, 

 Nesting Habits of the Nashville Warbler [in Mass.], Osprey, I, 1896, 20. (5) 

 Wm. Brewster, Birds of the Cambridge Region, 323. 



Calaveras Warbler 



HELMINTHOPHILA RUBRICAPILLA GUTTURALIS (RUfw.) 



Subspeeific Characters. — Similar to Helminthophila r. rubricapilla, but rump 

 and upper tail-coverts brighter, more yellow; underparts richer, deeper yellow. 



General Distribution. — Western United States. 



Summer Range. — High mountains, from the Sierra Nevada 

 (Calaveras Co., Calif.) to British Columbia (Vernon, Nelson, Okan- 

 agan district, etc.), eastward to eastern Oregon (Fort Klamath, 

 northern Idaho (Fort Sherman), etc. (Ridgw.). 



Winter Range. — Southern California to southern Mexico; east in 

 migration to central Texas. 



The Bird and its Haunts. — Although the Calaveras Warbler is 

 very rare or wanting in the Rocky Mountains, it is locally common in 



