Family SYLVIIDAE. 



Acrocephalus palustris (Bechstein) l ) 

 Marsh-Warbler. 



(Plate 63, fig. a— e). 

 (Snouckaert: Avifauna Neerlandica, p. 41, No. 98). 



Colour of surface of shell: 

 Colour of spots: 



Average dimensions: 

 Average weight of shell: 

 Texture of shell: 

 Shape : 



Nest: 



Site of nest: 



bluish white. 



olive brown ; brownish grey ; when lying deep- 

 er they appear to be of an ash-grey or violet 

 grey colour. Characteristic of the species are 

 the light grey, extremely small specks which 

 are very thickly spread all over the eggshell, 

 and the prominent large grey spots. 



19.1 X 13.9 millimetres. 



0.1 gram. 



not specially characterized. 



oblong ovoidal. 



is composed of vegetable materials; is some- 

 times lined with hair. 



not far from the ground, by preference in 

 willow and stinging-nettle bushes in the 

 midst of tall grass or reeds, sometimes at 

 a distance from water on arable land. 



l ) See also for this species the general remarks respecting the Family. 



