Vol. XXI 

 1904 



J Tliirteeyith Suppleyneut to the A. O. U. Check-List. 41"? 



Cryptoglaux Richmond, Auk, XVIII, April, 1901, 193. 

 Type, Strix tengmalmi Gmelin. 



Nos. 371, 372, and 372^? will thus stand as 



371. Cryptoglaux tengmalmi richardsoni (Bonaparte). 



372. Cryptoglaux acadica (Gmelin). 



372rt. Cryptoglaux acadica scotaea (Osgood). 



454«. Myiarchus cinerascens nuttingi (Ridgway). The 

 specimens recorded from Arizona, on the basis of which this 

 species was introduced into the Check-List, are found to be 

 female examples of M. cinerascens {cf. Nelson, Proc. Biol. 

 Soc. Wash., XVII, 1904, 35). No. 454^? is therefore to be 

 eliminated from the list. 



458a. Sayornis nigricans semiatra (Vigors). This proves 

 to be indistinguishable from S. nigricans (Swainson) {cf. 

 Brewster, Bull. Mus. Comp. Zool., XLI, 1902, 119), and is 

 to be removed from the list. 



469.1. Empidonax griseus Brewster. This is found to be 

 equivalent to E. canesceus Salvin & Godman, which has 

 priority {cf. Nelson, Auk, 1904, 80). Hence: 



469.1. Empidonax canescens Salvin & Godman. 



Empidonax canesceus Salvin & Godman, Biol. Centr.-Amer., 

 Aves, II, Feb., 1889, 79. 



488. Corvus americanus Audubon. An earlier name for the 

 American Crow is found in 



488. Corvus brachyrhynchds C. L. Brehm. 



Corvus brachyrhynchos C. L. Brehm, Beitr. zur Vogelkunde, 

 II, 1822, 56 {cf. Richmond, Proc. Biol. Soc. Wash., XVI, 

 1903. 125). 



