IV 



rRKFACE. 



Of the eight birds described and named as new by 

 Forster at the end of this memoir, six, according to the 

 most recent authorities on North American birds, are 

 entitled to remain under Forstcr's designation, namely, 



Falco saar, Forst. Hierofako gyrfalco var. sacer (Forst.) 

 Strix ncbii/osa, Vox?,i.^Syrniiim ncbulosum (Forst.) 

 Embcriza Icucophrys, Forst. ^ Zonotrkhia kucophrys (Forst.) 

 Muscicapa stria fa, Forst. - Dcudncca striata (Forst.) 

 Parus /iiidsonic-iis, Forst. = Farus hudsoniais (Forst.) 

 Sfo/opax boreal is, Forst. = Numcnius boreal is (Forst.) 



But it has been pointed out to me by Prof. Newton, 

 and, I think, correctly, that the species described by Forster 

 as FcTtko sacer is not the iVmerican form of Hierofako 

 gyrfako as commonly supposed, but Astur atricapilhis. 



Of the remaining two species described in the Appendix, 

 Fringilla hudsonias of Forster is usually identified with 

 Jnnco Jiyemalis (Linn.), and his Anas nivalis with Anser 

 Ityperboreus (Pallas). 



Falco spadiceus, shortly mentioned as a new species 

 in the first part of the memoir (p. 383), is commonly 

 referred to Circus hndsonins (Linn.). 



P. L. S. 



II. Il.ANdVKK SQI'ARK, LONDON, \V. 

 March 21J/, 1882. 



