RICHARDSON'S JAGER. 



(Lestris Richardsonii, Swainson. Richard, and Swains. North 

 Zool. ii. p. 433. pi. 73.) 



Sp. Charact. — The whole plumage brown ; the 2 middle tail feath- 

 ers abruptly acuminated : tarsus black, 22 lines long. — Young 

 unknown. 



This species, according to Dr. Richardson, breeds in con- 

 siderable numbers in the Barren Grounds, at a distance from 

 the coast, in the latitude of about 65°. It feeds on shelly 

 mollusca, which abound in the small lakes of the fur coun- 

 tries ; and it harasses the Gulls in the same way v/ith others 

 of the genus. This species is occasionally seen in winter, 

 in the inland bays in the vicinity of Boston, flying about in 

 pairs, or sitting on the water. 



Total length 22 inches 8 lines ; exclusive of the central tail feath- 

 ers 19 : these long feathers 9 inches ; the wing 13^ inches ; the bill 

 from above, 1 inch 1 line, from the rictus 1 inch 10 lines ; the tarsus 

 also 1 inch and 10 lines; the middle toe 1 inch 5 lines. — >^dtdt, 

 with the upper plumage deep blackish-brown, the back of the neck 



