150 



AVIFAUNA 



cf, 22 September 1904, Nieuwkoop, Zuid-Holland. 



9, 6 September 1905, » 



cf, 19 September 1905, » 



cf\ 7 October 1905, » 



$, 7 October 1905, » 



9, 7 October 1905, » 



cT, 12 October 1906, » 



cT, 20 October 1906, » 



9, 24 December 1906, » 



C?, 26 September 1907, » 



In August 1907 two more examples were killed on the 



same spot, these specimens however unfortunately have 

 been lost for our collection. 



56. Fuligula fuligula (L.). [Kuifeend], 



Very numerous in winter on the fresh-water lakes. 

 According to Mr. A. A. van Pelt Lechner this bird is 

 breeding in the province Noord-Brabant. We received 22 

 specimens killed in the months October, November, 

 December, January, February, March and April. This year 

 I received a male in change, shot 3 August 1908 near 

 Nieuwkoop. 



Hybrid between Fuligula fuligula (L.) X Aythia nyroca 

 (Güldenstadt). 



(Plate 7). 



A hybrid between the two named species has been shot 

 8 September 1905 at Nieuwkoop. It is a female. The 

 uppersurface has the appearance of a female fuligula, the 

 vermiculation of the feathers is however nearly absent; a 

 small crest is present; wing as in fuligula) chin white; 

 throat and neck dark brown ; feathers of the undersurface 

 brown with small or broader white edges ; forehead and 

 forepart of cheeks whitish ; iris yellow ; bill grey-black, feet 

 yellowish grey, webs black ; wing 195, bill 38 mm., the latter 

 having the shape of that of fuligula. 



ZVotes from the Ley den Museum, Vol. XXX. 



