ut.ACK-riiijoATKi) (;i;i:i:n WAiau.int. 41 



On the northward migration, I found them common at 

 WilHamsport, Pennsylvania, May 9, 1876, then in increasing 

 numbers until the 19, when they were abundant, this being 

 the height of the flight. Witli us, here in eastern Massachu- 

 setts, although occasionally found during the first >veek in 

 May, they do not appear, as a rule, until the second week. 



Dr Henry Bryant records seeing a pair of Blackburnian 

 ^^'arblels in the vicinity of Na-^sau, on the Bahamas, April 30, 

 1859, but I ha\'e never seen the species there, and consider 

 these islapids wholly out of the usual track of mioration. 



BLACK-THKOATED CiREEN AVAIIBLEK. 



Deu<U"ok'a vireiis. 



Plate IV, Fig. .5, male: Fig. (>, female. 



Size, 4.70 to 5.30. • Golden green above ; white beneath. 

 Throat, black ; cheeks, yellow. A common summer resident 

 all over New England. 



Male> Golden, or yellowish green above, with cheeks and line over eye 

 yellow. White beneath, with throat and streaks along sides black. Wing bars, 

 white. Spot on outer tail feather, extending nearly to base ( see Fig. 29 ). 



Female. Similar to the male, but with the black beneath not as extend- 

 ed, a portion of the throat being yellow. 



Young of both Sexes. Similar to the female but the black markings 

 below are often even more restricted. 



Nestlings. Dull orange above. Hue over eye, sides of head and beneath, 

 yellowish-white : throat, ear coverts and faint lines on sides of breast, dusky, 



Dimensions. Length, 5.10; stretch, 7.75 ; wing, 2.50 : tail, 1.85; bill, 

 .45; tarsus, .65. 



Comparisons. Readily known by the golden green of the back, yellow 

 cheeks and black throat, indications, at least, of which may be seen in all stages, 

 except the nestlings. 



Nests and Eggs. Nests usually placed in white pines, occasionally in 

 other trees, or even bushes, composed of small twigs, grasses and hempen fibers 

 of plants, lined with downy material. Eggs, four in number, oval in form, white, 

 spotted and blotched over the entire surface Avith brown and purplish of varying 

 shades. Dimensions, .50 by. 70. 



