6 PEOCEEDINGS OF THE NATIONAL MUSEUM vol. 77 



Museum. The striking thing about them is the heaviness of the 

 fluffy under down to the upper parts; this is not noticeable in a 

 made-up skin. 



17. MILVUS LINEATUS (Gray) 



Haliaetus Uneatus Geay, Hardwicke's 111. Ind. Zool., vol. 1, 1832, p. 1, pi. 18 

 (China). 



One male, 107 miles west-northwest of Paotow, Inner Mongolia, 

 April 14; one female, southeast corner of Lake Kokonor, Tibet, 

 August 14 ; one male, 30 miles west of Sining, Kansu, August 16. 



18. PANDION HALIAETUS HALIAETUS (Linnaeus) 



Falco haliaetus Linnaeus, Sys. Nat., ed. 10, 1758, p. 91 (Sweden). 



One female, 157 miles west-northwest of Paotow, Inner Mongolia, 

 April 11. 



This specimen has a wing 525 mm. 



Family FALCONIDAE 



FALCONS AND CARACARAS 



19. FALCO REGULUS INSIGNIS (Clark) 



Aesalon regulus insignis Clakk, Proe. U. S. Nat. Mus., vol. 32, 1907, p. 470 

 (Fusan, Corea). 



One male, Eastern Tombs, Chihli, December 19. 



A specimen (296193) from the Likiang Plain, Yunnan, April 14, 

 is much darker both above and below and probably belongs to an- 

 other form, but what name it should bear is a question for the 

 future. 



20, CERCHNEIS TINNUNCULUS DORRIESI Swann 



Cerchneis tinmmculus dorriesi Swann, Syn. List. Accip., 1920, p. 146 (Sidemi, 

 east Siberia). 



Five males and one female, 45 miles northwest of Ninghsia, Kansu, 

 May 3. 



Both the males and female are considerably lighter than specimens 

 from Szechwan and Yunnan {G. t. saturatus) ; the differences in 

 size are not so great, but the northern birds average larger. 



The two latest reviewers ^ of the kestrels of eastern Asia place the 

 present race in the synonymy of Cerchneis tinnuneulus tinnunculus, 

 but the few specimens examined by me point to the birds from the 

 dry arid region of the northeastern section being somewhat lighter 

 than European specimens. Clark* named a pale form from Fusan, 



8 Rothschild, Nov. Zool., vol. 33, 1926, pp. 231-233 ; and Stuart Baker, Fauna Brit. India, 

 Birds, ed. 2, vol. 5, 192S, pp. 60-67. 



*Proc. U. S. Nat. Mus., vol. 32, 1907, p. 470. 



