TRAILL'S FLYCATCHER. 235 



being in the month of April, I suspected the female had not begun to lay. 

 Five of the eggs in the ovary were about the size of green peas. I could 

 not perceive any difference in the colouring of the plumage between the 

 sexes, and I have represented the male in that inclined and rather crouching 

 attitude which I observed the bird always to assume when alighted. 



I have named this species after my learned friend Dr. Thomas Stewart 

 Traill of Edinburgh, in evidence of the gratitude which I cherish towards 

 that gentleman for all his kind attentions to me. 



Many specimens of this Flycatcher were procured by Mr. Townsend 

 about the Columbia River, several of which are still in my possession, after 

 giving one to the Prince of Mtjsignano, who had not seen one before, and 

 another to the Earl of Derby. 



Traill's Flycatcher, Muscicapa virens, Aud. Orn. Biog., vol. i. p. 236; vol. v. p. 426. 



Slightly crested; wing rounded, with the third quill longest, second and 

 fourth almost equal, first a little longer than sixth; tail slightly rounded, and 

 faintly emarginate; upper parts dusky olive, upper part of head much darker; 

 a pale greyish ring round the eye; two bands of greyish-white on the wings, 

 secondaries margined with the same; throat and breast ash-grey, the rest of 

 the lower parts shaded into pale yellow. 



Male, 5|, 8-*-. 



Arkansas. Columbia River. Migratory. 



The Sweet Gum. 



Liqutdambar styraciflua, Willd., Sp. PI., vol. iv. p. 476. Pursh, Fl. Amer., vol. ii. 

 p. 635. Mich., Arbr. Forest, de l'Amer. Sept., vol. iii. p. 194, PI. iv. — Moncecia 

 Polyandria, Linn. — AmentacejE, Juss. 



This species, which is the only one that grows in the United States, is dis- 

 tinguished by its palmate leaves, the lobes of which are toothed and acumi- 

 nate, the axils of the nerves downy. In large individuals, the bark is deeply 

 cracked. The wood is very hard and fine grained, but is now little used, 

 although formerly furniture of various kinds was made of it. When the bark 

 is removed, a resinous substance exudes, which has an agreeable smell, but is 

 only obtained in very small quantity. 



