Burns — On Alexander Wilson. 71 



miles, is of course, very great indeed. What was long con- 

 sidered to have been an almost parallel instance, — the Blue 

 Mountain Warbler, Sylvia nwntana^Dendroica montana of 

 Wilson, was taken in the Blue mountains of Pennsylvania. 

 The description of this species was so faithful that the writer 

 of this paper, while in the pinfeather stage, with no other 



SMALL-HEADED FLYCATCHER, Wilsonia microccphala, Ridgway. 

 Audubon, Birds of Am., Vol. IIIL, 183S, pi. 434, fig. 3,0m. Biog., Vol. 



v., 1839, p. 291 

 "general color light greenish-brown" 

 "short, the second quill longest, dark olive, two bands of dull white" 



"moderate length, even ; outer feathers with a terminal white spot 



on imier web" 

 "greenish-yellow, narrow white ring surrounding the eye" 

 "pale yellow, gi'adually fading into white behind" 



"male" 



"margins of a pond" 



"Kentucky" 



"early part of the spring, 1808" 



"Migratory, fond of low thick coverts, whether in the interior of 

 swamp, only the margins of sluggish pools, from which it re- 

 moves to higher situations after a continuation of wet weather 

 to rolling grounds amid wood comparatively free of undergrowth. 

 Song pleasing in this, which may be heard at a distance of 40 

 or 50 yards in clear weather. While chasing insects on the wing, 

 although it clicks it bill, the sound is comparatively weak, at 

 other times it searches among the leaves." 



work obtainable, was led to label an immature Black-throated 

 Green Warbler thus, and Audubon's example came from 

 California, loaned to him by the Zoological Society of London. 

 Ridgway has recently referred Wilson's bird to Dendroica 

 virens and Audubon's to D. tonmsciidii. It has been written 



