215 



*313b. Cerchneis tinnunculus ddrriesi Swann, Syn. 

 List Accip., p. 146 (1920). [$ Sidemi, E. 

 Siberia, Domes coll., June 2nd, 1884, type 

 in Tring Mus. ; co-type : $ Amur River, 

 E. Siberia, Domes coll., Mar. 27, 1894, in 

 Brit. Mus., Reg. No. 97, 10, 30, 258.]i 

 Siberian Kestrel. 



Larger and averaging paler above and 

 below ; wings and tail longer, the latter 

 especially much longer than in other forms ; 

 wing S 255-267, ? 260-267 mm. ; tail S 

 172-194, ? 178-200 mm. 



Siberia (Amur 

 River to 

 Yeneisei) and 

 Mongolia ; 

 S. in winter to 

 India, Ceylon, 

 Assam, Burma, 

 China and N.E. 

 Africa (Egypt 

 to Blue Nile). 



*313c. Cerchneis tinnunculus canariensis Koenig, 

 J.f.O., 1889, p. 263. [Canary /s.] 

 Canarian Kestrel. 



Smaller ; wing $ 215-225, ? 225-240 mm. ; 

 much darker above and below. 



W. Canary Is. 

 (Tenerife, 

 Gran Canary, 

 Hierro, Palma 

 Gomera) ; 

 Madeira. 



313d. Cerchneis tinnunculus 

 Mus. Pays-Bas, Rev. 

 (1873). [St. Vincent.-] 

 Cape Verde Kestrel. 



neglectus (Schleg.), 

 Accipitres, p. 43 



Cape Verde 

 Islands. 



Size similar ; wing ^ 222, $ 228 mm. ; a 

 form approaching the last. 



I Material from Siberia being very meagre, I have principally determined 

 this form from the considerable number of large and long-tailed birds, always 

 on the pale side, existing in collections from Ceylon, India, Assam, etc., which 

 are obviously migrants from the north, and have no connection with the smaller 

 and darker form breeding in N. India (C t. interstincius) , with the rather dark but 

 nearly typical bird breeding in W. Asia, or with the large dark race breeding in 

 Japan (C. t. japonicus). A large immature (J bird in my collection from Ceylon 

 has a tail measurement of 194 mm., and there are birds in the Tring collection 

 with nearly the same measurement. That this form also reaches the east side of 

 Africa is shown by ^ and ^ examples in my collection from the Blue Nile, both agreeing 

 in paleness with Siberian birds and having the wings respectively 260 and 262 mm., 

 and the tails 178 and 184 mm. Col. Meinertzhagen (Ibis, Jan. 1922, pp. 60-61) has 

 recently rejected the Siberian race on wing measurements, but he overlooked the 

 tail measurements. No such measurements as those cited can be found in typical 

 tinnunculus. 



