OF THE NETHERLANDS. 



147 



and Messrs. Pike and Popham presented to us a fine series 

 in different plumage, altogether 30 specimens. 



49. Nettion crecca (L.). [Wintertaling]. 



We received 15 specimens. In the collection van Wicke- 

 voort Crommelin is a female (if correctly sexed ?) — killed 

 at Santpoort, 25 November 1854 (247 — 3), assuming the 

 male plumage. Another example in the same collection 

 (247 — 4), a female, shot near Naarden, 14 April 1855, 

 has some white feathers on the forehead, on the head and 

 in the tail, while a female, shot at Beverwijk, 23 October 

 1876, has a great amount of white in its plumage and 

 shows the interesting fact that the left side is much more 

 whitish than the right one. The green speculum in the 

 right wing is more developed than in the left one, where 

 only one feather is green. Bill and feet are of a paler 

 colour than normal. A male, shot at Uitgeest, 2 October 

 1891 (Coll. van Wickevoort Crommelin, 247 — 10), has a 

 small white collar on the foreneck. 



Sometimes occur among these teals, as in other ducks, 

 specimens in which the undersurface is strongly ferruginous 

 brown, probably in consequence of their sojourn on ferru- 

 ginous water. In the collection van Wickevoort Crommelin 

 is .such an example, a male, shot 18 August 1857 on the 

 Wijkermeer (247 — 5). I received such another specimen, a 

 female, killed 14 August 1906 near Leimuiden, Zuid-Holland. 



Hybrid between Nettion crecca (L.) X Vafila acuta (L.). 



A male hybrid of these ducks is in the collection van 

 Wickevoort Crommelin (243 — 10). The bird wa3 caught 25 

 February 1868 at Waardenburg, Gelderland, and has lived 

 till 26 December 1870 in the Zoological Garden at Rotter- 

 dam. This bird much more resembles crecca than acuta 

 (see description by van Wickevoort Crommelin, Arch. Néerl. 

 Sc. ex. et nat. VII, 1872, p. 134). 



Notes from the Leyden Museum,' Vol. XXX. 



