136 Bird Studies. 



They nest on the ground in a manner similar to the Golden-winged Warbler, and 

 the eggs are very much like those of that bird in size and general appearance. 



There are two forms of Warblers that present characters common to 

 both of those just dealt with, the Blue-winged Yellow and the Golden-winged 

 Warblers, that seem to demand further study before their status in the bird 

 world can be definitely determined. These birds are known at present as 

 Brewster's Warbler, Helminthophila leucobronchialis, and Lawrence's War- 

 bler, Helminthophila lawrencei. 



Brewster's Warbler is a bird of which over one hundred individuals have 

 been captured and of which representatives may be seen in almost any large 



collection of birds. The upper parts, including- wings and 

 Brewster's , . . , j 5 j n 



,,, ,, tail, are bluish gray, it has a more or less denned yellow 



Helminthophila leucobron- crown, and a. black bar through the eye like the Blue- 

 winged Yellow Warbler. The wing bars are yellow. The 

 lower parts are white, with a faint yellowish tinge on the breast. The tail 

 feathers have markings of white like the Blue-winged Yellow. The sexes are 

 similar, the females having lighter yellow or white wing bars. 



There are many gradations of tint and color in the birds known and 

 the divergence seems to be from the extreme type known as Brewster's 

 Warbler, to birds more closely resembling the Blue-winged Yellow Warbler. 

 These birds have been taken throughout the range of the Blue-winged Yel- 

 low Warbler but they are perhaps more common in Northern New Jersey 

 near the Hudson River, in Westchester County, New York, and in the lower 

 Connecticut Valley. 



The author's personal experience with Lawrence's Warbler is limited to 

 a single female bird secured by him in the region back of Tarrytown, New 



T York, and catalogued as follows : 11,421. "Helminthophila 



Lawrence s 

 Warbler. lawrencei, female adult, Pocantico Hills, Westchester 



Helminthophila uwrcncei County, New York, in May, i8oi." He has also per- 



(Herrick). ' . ' i . Y * 1-11 r 



sonally examined the type bird from which the form was 

 described, and which is in the collection of David B. Dickinson, Esq., of Chat- 

 ham, New Jersey. This bird is much rarer than Brewster's Warbler, as only 

 some half dozen specimens have been recorded. 



