Addenda. 



Through some unaccounted for mistake three species as 

 given below were omitted from the regular list, and are in- 

 cluded here. 



239. Tringa maculata ViBill. 

 Pectoral Sandpiper. 



Migratory and rare. It has been taken by Jesurun at 

 Douglas and once upon the Laramie Plains. The latter speci- 

 men is in the University collection and was taken at Seven 

 Mile Lake in November, 1897. 



.347 a. Archibuteo lagopus sancti-johannis (Gmel.). 

 American Rough-legged Hawk. 



Migratory and rather common. This species may be a 

 Tvinter resident. Hayden reported this bird from Fort Laramie, 

 i860. Jesurun has taken them at Douglas and Bond at Chey- 

 enne. Grinnell notes that it is not common in the vicinity of 

 Lake Como. Allen reports it abundant in Carbon county in 

 -winter. Grinnell also reports it from the Yellowstone Park. 

 There is one specimen in the University collection that was 

 taken on the Laramie Plains during the fall of 1897. Its stom- 

 ach contained portions of a rabbit. 



Although this is a large, powerful hawk, it seldom attacks birds 

 •of any kind. In the fall of the year it feeds chiefly upon ro- 

 •dents in this state, and is especially fond of ground squirrels, 

 rabbits and mice. 



348. Archibuteo ferrugineus (Light.). 

 Ferruginous Rough-leg. 

 Summer resident and common. This is one of the most 

 valuable hawks known to this state. They feed almost entirely 



