1893.] NATURAL SCIENCES OF PHILADELPHIA. 43 



138. Ceophloeus pileatus. Pileated Woodpecker. 



Found in comparative abundance everywhere. 



139. Melanerpes torquatus. Lewis' Woodpecker. 



East of Cascades only. Rare in some localities, in others abun- 

 dant. 



*140. Colaptes auratus. Flicker. 



Two specimens in the Victoria Museum appear to be unmixed 

 auratus. I neither saw nor heard of pure auratus in the interior of 

 British Columbia nor in Washington. 



141. Colaptes cafer. Red-shafted Flicker. 



142. Colaptes cafer saturation Northwest Flicker. 



While cafer seems to be exclusively an eastern Cascade species, 

 saturatior cannot be said to confine itself to the coast, examples from 

 local areas of great rainfall in the interior being indistinguishable 

 from ordinary Vancouver Island specimens. Hybrids between 

 these forms and auratus are exceptionally abundant in the north- 

 west and have been made the subject of a special paper in Science, 

 Vol. XX, No. 514, to which the reader is referred. 



143. Chordeiles virginianus. Nighthawk. 

 Abundant in all interior localities. 



144. Chordeiles virginianus henryi. Western Nighthawk. 



Had not arrived on coast during my stay. Tacoma, Edwards 

 Bros. 



145. Cypseloides niger. Black Swift. 



First seen at Lulu Island, May 25th, and more seen on the 26th, 

 migrating leisurely. Frequently seen in great flocks on the Thomp- 

 son and over the lakes near Ashcroft. On the 7th of June my 

 notes report " 2,000 hovering low about a small lake," the only 

 chance I had to secure specimens. They remained there all that 

 day but were gone the next day. Occasional flocks appeared at 

 Clinton, Lac La Hache, Ashcroft and Kamloops until June 12th. 

 They were again seen at Vernon, June 22nd. At no time did they 

 appear singly or in detached pairs. 



The mystery of their nidification I was unable to solve, as they 

 appeared on all occasions to be gregarious and nomadic, rarely 

 remaining two days in the same place. None were seen on the 

 mountains during ascent, but they frequently disappeared among 

 them after a foray in the valley. At no time did they 



