574 APPENDIX. 



YELLOW-RUMP WARBLER. 



(Sylvia maculosa, Bonap. Sylvicola vfiaculosa, Swainson, North. 

 Zool. ii. p. 213. pi. 40.) 



Although rare in the United States, it appears, accor- 

 ding to Richardson, that this elegant species is a common 

 bird on the banks of the Saskatchewan ; where it is as 

 familiar as the common Summer Yellow Bird (S. (Estiva), 

 which it also resembles closely in its manners, and in its 

 breeding station, but is gifted with a more varied and agree- 

 able song. It frequents the thickets of young spruce trees 

 and willows, flitting from branch to branch, at no great dis- 

 tance from the ground, actively engaged in the capture of 

 winged insects which now constitute its principal fare. 



In mature specimens the anterior part of the back is pitch-black, 

 with the centres of the posterior feathers also the same. 



ROSCOE'S WARBLER. 



{Sylvia RoscOe, Audubon, Ornith. Biogr. i. p. 124. pi. 24:) 

 Sp. Charact. — Very dark olive; below yellow; a white streak 

 near and over the eye ; a broad black patch from the corner of the 

 eye passing over the ears ; tarsus short. 



This species was first discovered by Mr. Audubon in the 

 State of Mississippi and not far from the river of the same 

 name. It was pursuing its prey of winged insects in the 

 upper branches of a tall Cypress, and uttered at short inter- 

 vals a single twitt. It has a strong general resemblance to 

 the Maryland Yellow-Throat, {Sylvia Trichas), but is suffi- 

 ciently distinct. It is occasionally seen in the New Eng- 

 land States, and particularly in this vicinity, (Cambridge,) 

 in the same dark or low bushy thickets and swamps with 



