ICO Rives on Birds of Salt Po>/(f Mountain. Virginia. [April 



dant resident in the wooded parts about the Big Plain and in the Red 

 River Valley. Red Deer River. Most plentiful in winter, therefore prob- 

 ably in some degree migratory. 



122. Picoides americanus. American Three-toed Woodpecker. — 

 Not taken, but Richardson ascribes to it a range which includes Northern 

 Manitoba. 



123. Sphyrapicus varius. Yellow-bellied Sapsucker. — Common 

 summer resident about the Big Plain, on the Souris {Cones'), and in the 

 Red River Valley. Manitoba House and Swan Lake House. 



124. Ceophlceus pileatus. Pileated Woodpecker. Cock-of-the 

 Woods. — Rare resident in heavy timber. Occurs at Lake Winnipeg and 

 Lake of the Woods (/////e). Selkirk (G«y«/). At Swan River. Probably 

 in all the great forests to the north, as it is found north to latitude 63" 

 {Hickardson). 



125. Melanerpes erythrocephalus. Red-headed Woodpecker. — A 

 tolerably common summer resident about the Big Plain, and also along 

 the Red River. It is probably a summer resident in all wooded sections. 



126. Colaptes auratus. Flicker. Highholder. — Very abundant 

 summer resident all over. Red Deer Lake. Arrives April 15; departs 

 September 30. 



127. Antrostomus vociferus. Whip-poor-will. — Abundant summer 

 resident at Big Plain, Turtle Mountain, and in Red River Valley. Mani- 

 toba House. Arrives Maj' 20; departs September 15. 



128. Chordeiles virginianus henryi. Western Night-hawk. — Very 

 abundant summer resident all over. Manitoba House. Arrives May 24; 

 departs August 30. 



129. Chsetura pelagica. Chimney Swift. — Tolerably common sum- 

 mer resident all over. "A few observed at Swan Lake House." 



( To be concluded. ) 



NOTES ON BIRDS OF THE SALT POND MOUN- 

 TAIN, VIRGINIA. 



BY WILLIAM C. RIVES, JR., M. D. 



It has been well established by numerous observations that, as 

 far as birds are concerned, the northern and southern limits of 

 the various faunge correspond far more closely with isothermal 

 lines than with parallels of latitude. 



