THE GENUS CHORDEILES SWAINSON — OBERHOLSEE. 



Ill 



The difference between the gray and ochraceous phases of this 

 subspecies are not nearly so great as in Chordeiles acutipennis acuti- 

 pennis and Chordeiles acutipenjiis microineris ; that is, while the gray 

 phase is j)ractically identical in color with the corresponding phase 

 of Chordeiles aciitipennis Trvicronieris^ the ochraceous phase is not 

 nearly so deeply ochraceous nor so different from the gray phase. 

 The dark and light extremes in Chor^deiles acutipennis inferior are, 

 however, just as strongly marked as in the other races above men- 

 tioned. 



Specimens examined. — The writer has seen 26 specimens of this 

 new subspecies, from the localities that follow : 



Lower California. — Cape San Lucas (Sept. 11, 14, and 21, 1859) ; 

 San Jose del Cabo (Apr. 6, 1895; July 22, 1896; Aug. 5, 1896) ; Santa 

 Anita (Jan. 14 and 16, 1906) ; Triunfo (June 11, 13, and 14, 1887) ; 

 Valladares (May 21, 1889) ; Santa Cruz (May 23, 1889). 



Measurements of specimens of Chordeiles acutipennis inferior. 



1 Used in measurement averages on p. 110. 



2 Type. 



