ORDER PASSERES. 34/ 



[B 159, C 17, R 23, C 28.] 



Hab. Western United States, from the eastern base of the Rocky 

 Mouutains to the Pacific coast, south to Southern Mexico. 



7G8. SiaKa arctica (Swains.). 



Monntain Bluebird. 



Erythaca {Sialia) arctica SwAiNS. Fauna Bor. Am. II. 183 1, 209, 



Pl- 39- 

 Sialia arctica Nutt. Man. Land B. 1834, 573. 



[B .60, C 18, R 24, C 29.] 



Hab. Western North America (chiefly the interior), from the west- 

 ern parts of the Plains to the Pacific, north to Great Slave Lake, 

 south to Mexico. 



