BIRDS OF COLORADO. 7 



G. F. Breninger. I^ist of 257 species known by him to 

 have been taken in I^arimer County. 



R. A. Campbell. List of 40 species noted near Boulder. 



E. B. Darnell. Notes on 68 species found in Routt 

 County. 



H. G. Hoskins. Notes on 58 species seen near Burlington, 

 and dates of ipigration for four years. 



Mortimer Jesurn, M. D. lyist, with annotations, of 161 

 species taken on the Platte River 150 miles north of Cheyenne. 



W. P. Lowe. List of 188 species found at Pueblo and in 

 the Wet Mountains, distinguishing the breeders. 



Chas. F. Morrison. List of 332 species known to occur 

 in Colorado, of which 152 are marked as breeding in the State. 



Wm. Osburn. Annotated list of 254 species identified by 

 himself and Wm. G. Smith in the vicinity of Loveland. 



Capt. P. M. Thorne. Annotated list of 160 species shot 

 by him during five years residence at Fort Lyon. Especially 

 valuable, because nearly all the specimens have been identified 

 by Mr. Brewster and are now in the Field Museum in Chicago. 



One of the hardest things to determine in making out a 

 state list, is what shall constitute a valid record and entitle the 

 bird to a place in the list. The present writer has endeavored 

 to take a middle course between including everything that 

 seemed to have a fair claim for admission and excluding every- 

 thing to whose record attached any suspicion. With all species 

 at all doubtful the full record has been given, so that future 

 students may judge for themselves whether the species is en- 

 titled to entry. This course has been taken owing to the small 

 amount of work that has as yet been done on Colorado ornith- 

 ology. Some readers will undoubtedly believe that the records 

 of some of the species here given need confirmation and should 

 have been omitted. On the other hand the author can say that 

 he has in his possession the records of forty-two species that 

 have been ascribed to Colorado. Many of these, in fact the 

 larger part of them, he believes to occur in the State, yet 

 they have been excluded from this list, pending further infor- 

 mation. 



