OF THE NETHERLANDS. 



181 



171. Sterna dougalli Montagu. [Doug all's stern]. 



No specimen from the Netherlands in the collection. 

 According to H. Albarda (Tijdschr. Ned. Dierk. Vereen. II, 

 1889, p. 15) 5 specimens have been caught in Friesland, 

 30 October 1886. 



172. Sterna cantiaea Gmelin. [Groote stern]. 

 We received 6 specimens. 



173. Sterna minuta L. [Dwergstern]. 



The Museum received 14 specimens, adult and young ones. 



174. Hydrochelidon nigra (L.). [Zwarte stern].. 

 We received 12 specimens, adult and young ones. 



Alcidae. 



175. Alca torda L. [Alk]. 



We received 16 specimens, adult and young ones. This 

 bird is a common visitor to our country. Specimens in full 

 dress with entirely black head however are not often met 

 with; we possess only three specimens in this plumage, viz.: 

 cf, 5 June 1836, den Helder. 

 d\ 6 July 1858, Zandvoort. 

 Q, without exact locality, 12 April 1874. 



In the collection of the late van Wickevoort Crommelin, 

 there is no specimen in this perfect dress. 



An adult male with nearly black head, having on the 

 black throat and cheeks still some white feathers, was killed 

 on Schouwen, province of Zeeland, 27 February 1907. 



This year I received a young male, without white groove 

 on the bill, in which the head is nearly black, the throat 

 and cheeks being mixed with some white feathers. The 

 bird was shot near Texel, 12 May 1908. A similar, but 

 still younger male was shot near Texel, 21 August 1908. 



Notes from the Leyden Museum, Vol. XXX. 



