BLACK-THROATED GREEN WARBLER. 
(Sylvia virens, Latham. Wilson, ii. p. 137. pi. 17. fig. 3. Green 
Warbler, Pennant’s Arct. Zoology, vol. ii. No. 297.) 
Sp. Charact. — Yellowish-green; front, cheeks, sides of the neck, 
and line oyer the eye, yellow ; beneath whitish ; chin and throat 
to the breast black ; 2 white bars ’on the wings, which, as well as 
the tail, are dusky ; the 3 lateral tail-feathers marked with white. 
— Female with the chin yellow, and the throat blackish, tinged 
with yellow. 
This rather rare species arrives from its tropical win- 
ter-quarters in Pennsylvania towards the close of April 
or beginning of May. About the 12th of the latter month 
it is seen in this part of Massachusetts ; but never more 
than a single pair are seen together. At this season, a 
silent individual may be occasionally observed, for an hour 
at a time, carefully and actively searching for small cater- 
pillars and winged insects, amidst the white blossoms of 
the shady apple tree, and so inoffensive and unsuspicious 
is the little warbler, that he pursues, without alarm, his 
busy occupation, as the spectator, within a few feet of 
him, watches at the foot of the tree. While thus harm- 
