148 



AVIFAUNA 



50. Querquedula discors (L.). [Blauwvleugeltaling]. 



The only specimen observed in our country, a male 

 captured near Dokkum, province of Friesland, 24 October 

 1899, is in the possession of Bn. Snouckaert van Schauburg. 



51. Querquedula querquedula (L.). [Zomertaling]. 



This teal is very numerous in August and September, 

 when it leaves us ; it returns in March. In winter it is rare. 

 Our Museum received in the latter years a fine series of 

 26 skins in different stages of plumage, all killed in the 

 neighbourhood of Leiden, one of which, a male from Nieuw- 

 koop, 2 August 1905, has its undersurface dark ferruginous 

 brown. 



52. Spatula clypeata (L.). [Slobeend]. 



We purchased a fine series of 17 skins in different plu- 

 mage, almost all killed in the neighbourhood of Leiden. 



Hybrid between Spatida clypeata (L.) X Dafila acuta (L.). 



A male hybrid between these species was caught in the 

 province Zuid-Holland (place and date unknown) ; it has lived 

 till 10 July 1877 in captivity in the Zoological Garden 

 at Rotterdam, when it was purchased by van Wickevoort 

 Crommelin (242 — 5). 



It is difficult in this hybrid to determine which are the 

 parents. Clypeata is evident in the shape of the bill and the 

 coloration of the head, the top of the head, however, is 

 mottled as in the male acuta. The forepart of the breast is 

 brown like in penelope, some of the feathers vermiculated 

 with black ; rest of the undersurface as in acuta. The back is 

 not unlike an immature penelope', the wing shows relations 

 to clypeata and acuta. The speculum is almost as in clypeata, 

 the ferruginous wingbar of acuta is here nearly white with 

 only a ferruginous tinge on the apical end. It therefore is 

 very likely that also penelope blood is in this hybrid. 



Notes from the Ley den Museum, Vol. -XXX. 



