ADDITIONAL LIST OF BOULDER COUNTY BIRDS IO9 



Felger, F. M. Dille, William A. Sprague, L. C. Bragg, and the writer, 

 except so far as they appear in the collection. A manuscript list 

 received from Mr. Sprague shows eighty-one species noted by him in 

 the county, all of which, however, are included either in this or the 

 one published last April. 



The red-winged blackbird was omitted from the former list through 

 inadvertence, not through ignorance of its occurrence here, as so con- 

 spicuous and plentiful a species could hardly escape observation. The 

 record of the jaeger should have been parasitic jaeger (Stercorarius 

 parasiticus) instead of pomarine jaeger (S. pomarinus). The interro- 

 gation point after the dwarf thrush in the former list should be removed, 

 Mr. Sprague's identification having been confirmed by Mr. Ridgeway. 



The finding of the western blue grosbeak near Left Hand Creek is 

 an important item, as it had heretofore not been reported north of 

 Colorado Springs in this state, so far as the writer is aware, except one 

 specimen taken at Morrison. Professor A. H. Felger has taken one 

 specimen (the first) and F. M. Dille another near Altona, and the latter 

 reports several others at the same place. 



The sage sparrow reported by Mr. Dille seems to be the second 

 record east of the Front Range, the first being Mr. Bond's specimen at 

 Cheyenne. The white-winged scoter appears to be the eighth for Colo- 

 rado, Dr. Bergtold's specimen recorded in the Auk as the ninth having 

 been taken on October n, 1903, while Professor Felger's was taken 

 at Longmont on October 20, 1901. The scaup duck was mentioned 

 in the first list, but the specific identity was in doubt, so that the iden- 

 tification of the two species only adds one to the total number of species 

 for the county. The goldeneye adds nothing to the former list, so far 

 as the number of species known to occur here is concerned. The rose- 

 breasted grosbeak is the one at Longmont mentioned in Professor 

 Cooke's bulletins. 



Possibly the Wilson warbler (Wilsonia pusilla) should be added to 

 the list, as specimens from Boulder County so labeled are found in at 

 least one collection; but inasmuch as pileolata is common in the county 

 and in Colorado generally, while pusilla is declared by Ridgeway and 

 others only "occasional during migration in Colorado," it seems best 



