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AVIFAUNA 



outer underwingcoverts, vent and inn^i* part of tibiae pure 

 white (Coll. van Wickevoort Crommelin, 20 — 4, and Schlegel, 

 Cat. Accipitres, Circus aeruginosus, n^. 36) and another 

 young bird with the last-named specimen from the same 

 nest (Schlegel, ibid. n^. 35), having chin, upperpart of throat, 

 outer underwingcoverts, vent and tibiae white. The other 

 parts of these three birds are dark chocolate-brown with 

 lighter brown margins to some feathers of the uppersurface. 



69. Circus cyaneus (L.). [Blauwe kuikendief]. 



We received only one specimen, a young male, killed 26 

 October 1907 at Domburg, Zeeland. Altogether we possess 

 a series of 32 stuffed specimens from the Netherlands. 



70. Circus pygargus (L.). [Aschgrauwe kuikendief]. 



We received a female, shot on its nest, with two eggs 

 from Ameland, 12 June 1905, where this species is rather 

 common. Further a male shot in July 1906 near Asten, 

 Noord-Brabant, and a male shot 30 August 1908 at Deurne, 

 Noord-Brabant. The series of 35 specimens in the collection 

 van Wickevoort Crommelin is splendid. 



71. Circus macrourus (Gmelin). [Steppenkuikendief]. 



We have only one specimen shot in our country, viz. : 

 the female, killed on the dunes of Noordwijk, 23 April 

 1866, and preserved in the collection van Wickevoort Crom- 

 melin (22 — 1). This species is very rare in the Netherlands, 

 only two further specimens are known from our country. 



72. Astur palumharius (L.). [Havik]. 



In the latter years we did not receive this species. There 

 are in our collection 15 examples from the Netherlands. 



73. Accipiter nisus (L.). [Sperwer]. 



24 specimens, mostly killed in the last four mouths of 

 the year, only one in January, three in February and two 

 in March, 



T^otes from the Leyden IMuseum, Vol. XXX. 



