168 



Mr. C. J. MAYNARD, of Ipswich, gave an interesting 

 sketch of the mechanism of the flight of birds, which he 

 illustrated by a series of preparations of the breast bones, 

 and by drawings on the blackboard. He also alluded to 

 the means by which animals belonging to other classes 

 are enabled to fly with a greater or less degree of perfec- 

 tion ; such as the bats, flying fishes, flying reptiles, etc. 



A discussion on some points of structure followed, par- 

 ticipated in by Messrs. F. W. Putnam, A. S. Packard, 

 Jr., and others. 



Mr. F. W. PUTNAM read the following communication : 



NOTES ON THE BIRD-FAUKA OF THE SALT LAKE VALLEY AND 

 THE ADJACENT PORTIONS OF THE WAHSATCH MOUNTAINS. 



BY EGBERT EIDGWAY. 



THE recently published paper of Mr. J. A. Allen* upon the birds 

 collected and observed by him in the vicinity of Ogden, in the Salt 

 Lake Valley, has called the attention of ornithologists to that field ; 

 and has, moreover, particularly attracted those interested in the sub- 

 ject of the geographical distribution of North American birds. 



While Mr. Allen's observations were made during the season of the 

 autumnal migration, I had the good fortune to explore nearly the 

 same ground during the breeding season,! or when the summer fauna 

 was stationary. Combining, therefore, the results of the two explo- 

 rations, and taking into additional consideration that we collected in 

 localities a few miles apart Mr. Allen at Ogden and I at and about 

 Salt Lake City the character of the avi-fauna of the western water- 

 shed of the Wahsatch may be pretty well shown. 



*See Bulletin of the Museum of Comparative Zoology, Cambridge, Mass., Vol. 

 iii, No. 6, July, 1872. Part viii, List of the Birds collected in the vicinity of Ogden, 

 Utah Territory, from Sept. 1 to Oct. 8, 1871; with Annotations, pp. 1G4-173. 

 (Species 137.) 



tit is fitting to state here that my investigations were made under the auspices 

 of the government, I being attached to the U. S. Geological Survey of the -40th 

 parallel, as zoologist. Mr. Clarence King, U. S. Geologist in charge of the Survey, 

 throughout the continuance of the work, offered me every possible facility. The 

 general report upon the birds collected and observed by Mr. King's Survey is now 

 in press and nearly completed, and will ere long be before the public. 



