AUDUBON'S WARBLER 147 



etc., lined with hair, rootlets, and a large number of feathers; this 

 feather lining and the coarse character of the nest apparently being 

 diagnostic. 



TerrilP describes the nest as "very substantial and warmly built" 

 and "composed chiefly of dead spruce twigs with a few grasses and 

 rootlets, bound with spiders' silk and thickly lined with feathers and 

 animal hair." 



Eggs. — 3 to 5, usually 4. Ground color dull white to creamy 

 white spotted and blotched with various shades of reddish brown, 

 pale lavender, and a few marks of purplish black; in most cases a 

 wreath around large end. Size; average, .70X.53, extremes measure 

 .75X.55, .64X.51. (Figs. 48,49-) 



Nesting Dates. — Lancaster, N. H., May 31-June 7 (Spaulding) ; 

 Bangor, Me., May 30- June 6 (Knight) ; Listowel, Ont, June 8 

 (Kells) ; Porcupine Mts., Mich., July 16, adults with young, (Barrows) . 



Biographical References 



(1) W. L. Kells, The Myrtle Warbler (in Ontario), Ottawa Nat., XVI, 

 igo2, 144. (2) L. M. Terrill, Summer Warblers in Compton County, Quebec, 

 Ibid., XVIII, 1904, 151. 



Audubon's Warbler 



DENDROICA AUDUBONI AUDUBONI (Towns.) Plate X 



Distinguishing Characters. — With a general resemblance to Dendroica cor- 

 onata but with the throat usually yellow the outer four tail-feathers marked 

 with white. In some young females the yellow of throat is barely evident or 

 wholly absent but almost invariably they may be distinguished from D. coro- 

 nata by having four instead of three outer tail-feathers with white. I have 

 seen but one specimen of auduboni having only three outer tail-feathers 

 with white, but in this, a young female, the amount of white was so in excess 

 of that which is found in coronata of the same age and sex that the bird's 

 identity was unquestionable. Length (skin), 5.10; wing, 3.00; tail, 2.30; bill, .40. 



Adult <$, Spring. — Above bluish gray streaked with black, crown-patch 

 and rump bright yellow; upper and lower portions of eye-ring white, cheeks 

 bluish gray; tail black edged with gray the outer four or five feathers with a 

 white patch near the tip; wings black edged with gray the median wing- 

 coverts broadly tipped, the greater coverts tipped and, externally, widely mar- 

 gined with white forming a white patch in the wing; throat and sides of the 

 breast yellow; breast black more or less edged with gray, white of belly 

 dividing the black posteriorly; flanks white streaked with black. (This plum- 

 age is usually acquired in April.) 



Adult $, Fall. — Quite unlike t? in Spring: crown and back grayish brown 

 the latter indistinctly streaked with black; yellow of crown more or less con- 

 cealed by brownish tips; rump bright yellow; tail as in Spring; margins to 

 wing-coverts more or less brownish; throat yellowish white tinged with buff 



