26 Wyoming Experiment Station. 



upon the I^aramie plains. In speaking of this species at Lake 

 Como, Carbon county, Dr. WilHston remarks : "No bird is 

 so characteristic of the lake, and none so common as this. A 

 single individual was seen May 4th, and in a week there were 

 thousands covering the lakes for acres. I do not remember 

 of seeing one leave the water. They began to lay their eggs 

 on the 2nd and 3rd of June. One can hardly speak of their 

 nest, for they have none. Out in the water, sometimes when 

 four feet deep, a few reeds are broken down to float upon the 

 surface, there forming a raft upon" which the eggs are laid, 

 almost invariably five in number. In more than a score of 

 cases hardly one of the eggs were dry ; but lying more or less 

 in the water." Coues, Bond and Jesurun report this species 

 as abundant. Grinnell records it from Yellowstone Park, 1875, 

 and McCarthy took specimens from the Sweetwater river in 

 1859. In the University collection there are three specimens, 

 taken as follows: Howell lake, Sept. i, 1897; Hutton's lake, 

 Nov. 16, 1898; Hutton's lake, October, 1898. 



6. Podilymbus podiceps Linn. 



Pied-billed Grebe. 



Migratory; very rare. The only records are those of 

 Bond of Cheyenne and Dr. Jesurun of Douglas. Dr. Jesurun 

 took one specimen at Douglas, May 5, 1891. 



LOONS. 



7. Gavia imber (Gunn.). 



Loon. 

 Migratory; common; Found on large ponds and lakes, 

 usually during early spring and late fall. I have seen these 

 birds nearly every season at Hutton's lakes. A single bird 

 was taken at Rock Creek station by Mr. Griifin in the fall of 

 1897. Dr. Jesurun has notes on two specimens taken from the 

 North Platte river near Douglas. Mr. Bond has several rec- 

 ords of them being seen at Cheyenne. Mr. West of Buffalo 

 has mounted several that have been taken from Lake DeSmet. 



