﻿OF THE NETHERLANDS. 



149 



53. Netta rufina (Pallas). [Krooneend]. 



After the specimeD, which I have mentioned in vol. XXVI, 

 p. 196 of this periodical, the Museum did not receive another 

 example. We possess 10 specimens from the Netherlands. 



54. Aythia firina (L.). [Tafeleend]. 



Very common on migration and not rare in winter; 

 found breeding in Noord-Brabant, Friesland and Noord- 

 Hollaud and I presume it breeds also on the lakes near 

 Leiden. We were presented by Mr. T. M. Pike with and 

 we purchased together 24 specimens in different plumage, 

 respectively from Veere (province Zeeland), the neighbourhood 

 of Leiden and from Texel. An adult male, shot 28 January 

 1905 at Nieuwkoop, is interesting as to the amount of black 

 on vent and under tailcoverts, not only the under tailcoverts 

 being black, but also the abdomen is nearly black, only 

 sparingly verraiculated with grey; also the black of the 

 breast has a greater extension. In the collection van Wicke- 

 voort Crommelin is an old male in full dress (249 — 3), shot 

 26 January 1855 on the Y, in which the undersurface is 

 dull brown. 



Hybrid between Aythia ferina (L.) X Aythia nyroca 

 (Giildenstadt). 



Of this hybrid, the so-called Fuligula homeyeri Badeker, 

 a male is in the collection van Wickevoort Crommelin 

 (249 — 5). The bird has been caught alive in our country, 25 

 February 1870, locality not mentioned, and has lived till 

 9 June 1870 in the Zoological Garden at Rotterdam. 



55. Aythia nyroca (Giildenstadt). [Witoogeend]. 



This species belongs to the rarer ducks of our country. 

 Every year specimens are killed on the lakes in the neigh- 

 bourhood of Leiden and it is not impossible that a single 

 pair breeds there. 



I received the following specimens : 



Notes from the Leyden Museum, Vol. XXX. 



