32 birds and mammals of east siberia [^volv^ 



Falconidae. 

 Circus cyaneus cernuus subsp. nov. 



One fine adult male, taken at Nijni Kolymsk, Kolyma, June 4, 

 1912, was the only individual seen by Koren, although the bird 

 was known by the natives. 



Compared with males in full breeding plumage from western 

 Europe, this example is so very much paler that we believe it cer- 

 tainly represents a different subspecies. It also is smaller. 



We have been unable to find a name applying to this form ; cer- 

 tainly variabilis of Pallas cannot be used, as that name covered 

 the whole species and is a pure synonym of cyaneus; we therefore 

 have given it a new one. 



Two fine adult males in the Museum of Comparative Zoology, 

 taken by Zappey in Hupeh, China, in February, are exactly like 

 European skins, as are also several adult males in this Museum, 

 from India, killed in December and January; so the winter range 

 of the new form must, we think, be sought nearer by. 



The new subspecies may be known as follows : 



Type, from Nijni Kolymsk, Kolyma, adult cf, no. 64,026, M. C. Z., 

 collected June 4, 1912, by Johan Koren. 



Characters. — Similar to true Circus cyaneus (Linn.) of western Europe, 

 but the adult male considerably smaller and very much paler in color, the 

 whole upper parts being pale gull gray (Ridgway, PI. LIII, No. 10), barely 

 contrasting with the white upper tail-coverts, and wholly lacking any tinge 

 of grayish brown or brownish gray. 



Measurements. — Type, adult cf : wing, 340; tail (feathers), 209; tarsus, 

 67; exposed culmen, 24; culmen from end of cere, 15.5 mm. 



Astur palumbarius caesius Buturlin. 



One fine adult female, Sredna Kolymsk, April 15, 1912. The 

 Goshawk was not seen by Mr. Koren in life. The one specimen 

 he got was caught in a ptarmigan snare. 



