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AVIFAUNA 



88. Falco peregrinus Tunstall. [Slechtvalk]. 



We received only two young specimens, a very small 

 female (if well sexed?), killed 9 October 1907 at Wester- 

 nieland, Groniugen (wing 310 mm.), and a female killed 

 17 October 1907 near Workum, Friesland. In the collection 

 van Wickevoort Crommelin and in our general collection 

 together we possess 41 stuffed specimens killed in the 

 Netherlands. We have very small specimens, which are 

 determinated as females, but as the determination of the 

 sex in young birds generally and in young birds of prey 

 specially is very difficult and often requires microscopical 

 examination, it is possible that the sexes mentioned on the 

 labels are not always correct. 



89. Falco barharus L. [Barbartjsche valk]. 



We possess a female, caught August 1857 at Valkens- 

 waard, Noord-Brabant. This bird lived till 2 August 1862 

 in the Zoological Garden at Amsterdam and was then pre- 

 sented to our Museum. Schlegel supposed the bird to be 

 Falco barharus L. (Cat, Falcones, Falco barharus^ n*^. 6); 

 he mentioned it as a male, on the postament the sex is 

 however given as female. After a careful examination I 

 am also convinced, that this specimen belongs to barbarus. 

 As the bird has lived during five years in confinement, 

 the plumage is certainly not quite normal and not in 

 keeping with its age. The uppersurface is pale brownish 

 grey, the feathers with faint blackish bars and with pale 

 rufous edgings ; crown and forehead dark brown with black 

 shaft-stripes and rufous edgings; hindueck rufous with 

 some dark brown spots; earcoverts greyish brown; cheek- 

 stripes blackish, margined with rufous at the hinder part; 

 sides of neck, chin and throat creamy white; groundcolour 

 of undersurface white with buff tinge, on the lower breast 

 and the sides of the breast with rusty tinge; markings on 

 the undersurface like in an old peregrinus, upperbreast 

 with a few black shaft-lines; wing 310, tail 175, tarso- 



^otes from the Leyden Museum, "Vol. XXX. 



