MUSEUM OF COMPARATIVE ZOOLOGY. 159 



41. Falco sparverius. Not common. 



42. Buteo sp. '? A large Buleo was occasionally seen, but none were 

 procured. 



43. Aquila chrysaetos. Occasionally observed. 



44. Circus cyaneus, var. hudsonius. Seen occasionally throughout 

 the Park. Shot a pair at Fairplay. 



CATHARTID^. 



45. Cathartes aura. Not frequent, and seen only at Fairplay. 



COLUMBIDiE. 



4G. Zenaedura carolinensis. Not common. A few pairs were seen at 



intervals. 



TETRAONIDJE. 



4 7. Tetrao obscurus. Apparently not common. 



CHARADRIID-S!. 



48. .ffigialitis vociferus. Common. 



49. iEgialitis montanus. Not common. Saw newly hatched young 

 July 28th, and full-grown young the day preceding. 



SCOLOPACID.S1. 



50. Gambetta melanoleuca. A single specimen was shot on the 

 Platte, near the eastern edge of the Park, — the only one seen. 



51. Rhyacophilus solitarius. A single pair was seen near Hamilton. 



52. Tringoides macularius. Common along the streams. 



ANATIDJE. 



53. Chaulelasmus streperus. A single female was shot July 28th on 

 the Platte, near the eastern edge of the Park, — the only one seen. 



54. Querquedula sp. ? A few pairs were seen along the streams, and 

 at some brackish lakes near Hamilton, probably Q. cyanoptera. 



VII. List of Birds ohserved in (lie Vicinity of Mount Linclon, Park 

 County, Colorado, from July I'dtli to July 2Gth, 1871 ; with Annota- 

 tions. 



The birds mentioned in the following list were all observed during a 

 week spent in the vicinity of Montgomery, at the northeastern base of 

 Mount Lincoln, at the head of the South Platte River. Doubtless all 

 the species mentioned breed at, or near, where they were observed ; 

 the list also probably includes nearly all that occur there in summer. 

 The region is strictly alpine in its features. Our camp was in the 



