72 LAWRENCE'S WARBLER 



BIOGRAPHICAL REFERENCES 



(i) F. T. JENKS, The Blue-winged Warbler; Its Nesting Habits, Orn. and 

 O61., VI, 1881, 57. (2) J. N. CLARK, The Blue-winged Warbler, Orn. and 

 O61., VIII, 1883, 37. (3) I. S. REIFF, A Few Days among the Blue-winged 

 Warblers [near Philadelphia?], Orn. and O61., XVIII, 1893, 6. (4) E. H. 

 EAMES, Notes on the Blue-winged Warbler and Its Allies, Auk, VI, 1889, 

 305. (5) B. S. BOWDISH, Some Breeding Warblers of Demarest, N. J., Auk, 

 XXIII, 1906, 16. 



INTERMEDIATES BETWEEN 



VERMIVORA CHRYSOTERA and V. PINUS 



Distinguishing Characters. Between the Golden-winged and 

 Blue-winged Warblers there exists a series of intergrades known 

 variously as Lawrence's Warbler (Venmvora lawrencei) and 

 Brewster's Warbler (Vermivora leucobronchialis) . Typical 

 lawrencei is a yellow bird with a black throat and auriculars, in 

 short, pin us with the black markings of chrysoptera. Typical leuco- 

 bronchialis, meaning the extreme development of the leucobronchialis 

 type, is white below, gray above with the forehead and 

 wing-bars yellow. A discussion of the status of these interesting 

 birds follows a description of their plumages. 



LAWRENCE'S WARBLER 



VERMIVORA LAWRENCEI (Herrick) Plate V 



Adult <3, Spring. Crown yellow; lores and upper part of auriculars black; 

 back bright olive-green ; tail grayish, inner vanes of the three outer feathers 

 largely white, fourth with much less white; wings grayish, inner feathers 

 edged with olive-green; wing-bars as in H. pinus or chrysoptera or white 

 but as broad as in chrysoptera ; chin and sides of the throat yellow, throat 

 and upper breast black, rest of underparts yellow, the sides greener. A speci- 

 men in the Bishop collection has the chin yellow, the sides of the throat white. 



Adult ?, Spring. Cheek stripe and throat dusky olive, rest of plumage as 

 in . pinus but wing-bars sometimes as in chrysoptera; another specimen 

 resembles $ chrysoptera but is greener above and more yellow below. 



Nestling. Like similar plumage of pinus but cheek-stripe and throat-patch 

 dusky. 



General Distribution. Northern New Jersey, tower Hudson 

 valley, eastward to the Connecticut valley in Connecticut. 



Summer Range. Specimens have been taken or observed near 

 Chatham, N. J. (Herrick}, Hoboken, N. J. (Lawrence), Morristown, 

 N. J. (Brewster), Englewood, N. J. (Dwight), Bronx Park, New 

 York City (Bildersee, Beebe), Rye, N. Y. (Foorhees), Stamford 



