215 
*313b. Cerchneis tinnunculus dorriesi Swann, Syn. Siberia (Amur 
List Accip., p. 146 (1920). [$ Sidemi, E. River to 
Siberia, Déorries coll., June 2nd, 1884, type Yeneisei) and 
in Tring Mus. ; co-type: 2 Amur River, Mongolia ; 
E. Siberia, Dorries coll., Mar. 27, 1894, in S. in winter to 
Brit. Mus., Reg. No. 97, 10, 30, 258.]1 India, Ceylon, 
Siberian Kestrel. Assam, Burma, 
China and N.E. 
Larger and averaging paler above and Africa (Egypt 
below ; wings and tail longer, the latter to Blue Nile). 
especially much longer than in other forms ; 
wing § 255-267, 9 260-267 mm.; tail ¢ 
172-194, 2 178-200 mm. 
*313c. Cerchneis tinnunculus canariensis Koenig, W. Canary Is. 
OP NS89;p..263.. (Canary Is.] (Tenerife, 
Canarian Kestrel. Gran Canary, 
Hierro, Palma. 
Smaller ; wing ¢ 215-225, 9 225-240 mm.; Gomera) ; 
much darker above and below. Madeira. 
313d. Cerchneis tinnunculus neglectus (Schleg.), Cape Verde 
Mus. Pays-Bas, Rev. Accipitres, p. 43 Islands. 
(1873). [St Vincent.] 
Cape Verde Kestrel. 
Size similar; wing. ¢ 222, 9 228 mm.; a 
form approaching the last. 
1 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. ¢. interstinctus), with the rather dark but 
nearly typical bird breeding in W. Asia, or with the large dark race breeding in 
Japan (C. ¢. japonicus). A large immature ¢ 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 9 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 (Jbis, 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. 
