1 66 VERTEBRATES: BIRDS. 



The Least Flycatcher, E. minimus, Baird, of the United 

 States east of the Missouri plains, is five inches long, the 

 wing two inches and six tenths. 



The Small Green-crested Flycatcher, E. acadicus, Baird, 

 of the United States east of the Mississippi, is five inches 

 and six tenths long, and the wing three inches ; the upper 

 parts, with sides of the head and neck, olive green ; throat 

 and middle of the belly, white ; the other under parts pale 

 greenish-yellow. 



The Yellow-bellied Flycatcher, E. flaviventris, Baird, 

 of North America, is over five inches long, the wing less 

 than three inches ; and distinguished by the bright sul- 

 phur-yellow of the under parts. 



Hammond's Flycatcher, E. Hammondii, Baird, of the 

 vicinity of Fort Tejon, is five inches and a half long, the 

 wing less than three inches ; and at once distinguished 

 by its very slender bill. 



Wright's Flycatcher, E. obscurus, Baird, of the Rocky 

 Mountains, is five and three, fourths inches long, and the 

 wing two and three fourths. 



The Genus Pyrocephalus comprises the Red Flycatcher, 

 P. rubincus, Gray, of the Rio Grande region, which is 

 five and a half inches long, the wing three and a quarter 

 inches, the head fully crested, crown and whole under 

 parts bright carmine ; the remaining upper parts dark 

 brown. 



The Sub-Order of Oscines comprises the true singing- 

 birds, such as have the larynx provided with five pairs of 

 peculiar muscles, which are used in the production of 

 song. North America has twelve families, Turdidae 

 or Thrush Family, Sylvicolidae or Warbler Family, Hi- 

 rundinidae or Swallow Family, Bombycillidae or Waxwing 

 Family, Lanidae or Shrike Family, Liotrichidae or Mock- 

 ing-Bird Family, Certhiadae or Creeper Family, Paridae 

 or Titmouse Family, Alaudidae or Lark Family, Fringil- 



