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 Yieill. 

 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 

 winter 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 (LichT.). 

 Ferruginous Rough-leg. 

 Summer resident and common. This is one of the most 

 valuable hawks known to this state. They feed almost entirely 



