124 APPENDIX. 



Scotiaptex cinereum. 



GREAT GRAY OWL. 



In the Manual of North American Birds the name of the 

 genus in which this species is placed is 'given as above, it being 

 the opinion of the author of the Manual that the substitution 

 of Ulula for Scotiaptex, as the name for this genus, was an error. 



Empidonax dificilis. 



WESTERN FLYCATCHER. 



"Called 'Baird's Flycatcher' in the A. O. U. Check- List, 

 but this name belongs properly to E. bairdii" (RIDGWAY). 



Corvus corax sinuatus. 



MEXICAN RAVEN. 



Corvus corax principalis. 



NORTHERN RAVEN. 



This last is a new sub-species, described by Mr. RIDGWAY in 

 the Manual. 



The name sinuatus, which was given to the American Raven 

 in the A. O. U. Check-List, is retained by Mr. RIDGWAY for the 

 Mexican Raven a form that is found in the "Western United 

 States, and south to Guatemala." From lack of specimens the 

 describer is unable to determine which sub-species the birds of 

 the Eastern United States belong to. 



Whether both varieties are represented in the fauna of 

 Canada is yet to be decided, and, until evidence to the con- 

 trary is forthcoming, I propose to replace sinuatus by princi- 

 palis, allowing the former to remain among the hypothetical 

 cases. 



