144 



AVIFAUNA 



upper tailcoverts as in boschas, tailfeathers not recurved ; 

 wingspeculum green as in crecca, the greater wingcoverts 

 as in boschas, but with small lightbrown edgings ; elongated 

 scapulars as in boschas but more brownish, not black and 

 white as in crecca; breast chestnut-brown with black spots ; 

 vent and sides of body greyish, vermiculated with black 

 as in crecca (not so minutely as in boschas) ; under tailcoverts 

 black with a pale buff patch on each side; under wing- 

 coverts pure white ; iris dark brown ; bill black, sides of 

 the upper jaw yellowish olive, lower jaw ochre-yellow with 

 black spots ; legs and feet pale orange with blackish webs 

 and nails; total length in flesh 540, wing 275, tarso-met. 

 42, bill 50 long and 20 mm. broad. 



In the collection van Wickevoort Crommelin (241 — 12) 

 is a male hybrid between these two species, agreeing with 

 the above described one; this bird has been shot 10 March 

 1868 in the province Gelderland. 



The bird mentioned by van Wickevoort Crommelin and 

 by Schlegel as being a hybrid between the two above named 

 species (van Wickevoort Crommelin, Ned. Tijdschr. Dierk. 

 II, 1865, p. 294; Schlegel, Cat. Anseres, Anas boschas, n°. 30) 

 is a steril female of the domestic race, assuming partly the 

 male plumage. 



Hybrid between Anas boschas L. X Spatula clypeata (L.). 



A male hybrid between these species, caught in the 

 province Zuid-Holland near Rotterdam, 12 February 1861, 

 is in the collection van Wickevoort Crommelin (241 — 5). 

 See the description of this example by van Wickevoort 

 Crommelin, Ned. Tijdschr. Dierk. I, 1863, p. 174 l ). 



46. Dafila acuta (L.). [Pijlstaart]. 



We received 14 males and females in different plumage 

 from the vicinity of Leiden and from Texel. 



1) In the collection van Wickevoort Crommelin is a hybrid between Anas 

 boschas L. and Netta rufina (Pallas). Tbis bird is not wild shot, but bred in 

 captivity in the Zoological Garden at Rotterdam. 



Notes from the Ley den Museum, Vol. XXX. 



