OF THE NETHERLANDS. 



145 



In the collection van Wickevoort Crommelin is an example, 

 captured at Schagen , Noord-Holland , 2 October 1888 

 (243 — 12), labelled by him hybrid of Anas crecca and acuta 

 (see the description from the hand of van Wickevoort 

 Crommelin in Leverkühn's paper in Journ. für Ornithologie, 

 1890, p. 212). It is a female and it resembles in every 

 respect the female of acuta exept in its size; the coloration 

 of the head is also as in acuta, not as in crecca as 

 Crommelin states. There is even no indication of a green 

 wingspeculum, which in crecca both male and female 

 possess and that should be indicated, when one of the 

 parents was a crecca. If the bird is really a hybrid, it can 

 be in my opinion only a cross of acuta and querquedula. 

 The dimensions are: wing 225, tail 95, tarso-met. 28, bill 

 38 mm. 



Hybrid between Dafila acuta (L.) X Anas boschas L. 



Hybrids of these two species are represented in the general 

 collection by the following examples : 



tf, March 1888, Warmond, Zuid-Holland. Presented by 



Mr. G. S. van der Spruyt. 

 <ƒ, 10 February 1897, Makkum, Friesland. Presented by 



Mr. H. Albarda. 

 cf, 10 January 1907, Ellemeet on Schouwen, Zeeland. 



These three specimens resemble the male figured in 

 Naumaun's Vogel Mitteleuropas, last edition, Bnd. X, Taf. 

 9, fig. 1. From the third specimen I noticed the colours 

 of the soft parts as: iris dark brown, bill light grey with 

 black tip and a black streak along the middle, lower bill 

 for the greater part black, feet pale orange-yellow. 



A fourth specimen of the same hybrid and also a male 

 is received in 1870 from the Zoological Garden at Rotter- 

 dam, but it is not mentioned whether it was a wild bird 

 or a specimen bred in captivity. 



In the collection van Wickevoort Crommelin are three 

 specimens of this hybrid: a male shot 18 January 1862 

 near Rotterdam, a male shot 26 January 1866 in the pro- 



.Notes from the Leyden Museum, Vol. XXX. 



10 



