^s.s 



As before remarked, the birds of Colorado, especially as to 

 their breeding range, have been but little studied, and any eastern 

 ornithologist who wishes to combine collecting and investigation 

 with recreation and a new supply of health can find no better 

 field for his summer outing than the parks and peaks of the 

 Rocky Mountains of Colorado. 



ADDITIONAL CHARACTERS OF THE MACROPTERY- 



GID^. 



BY FREDERIC A. LUCAS. 



In 'The Auk' for January, 1889, I proposed the family Deti- 

 drochelidonidcc for the reception of the Tree Swifts of Malaysia, 

 establishing it upon well-marked characters found in the cranium 

 and shoulder-girdle. Unfortunately I was not then aware that 



