THE IBIS 



EIGHTH SERIES. 



No. VI. APRIL 1902. 



XII. — On some rare Palcearctic Birds' Eggs. 

 By H. E. Dkesser, F.Z.S. 



(Plate VI.) 



During the past twelve months I have been experimenting 

 upon the three-colour process for eggs^ with a view to the 

 publication of a work on Palaearctic Oology illustrated by that 

 method. Thanks to Mr. Geddes, of Messrs. Andre & Sleigh, 

 Ltd., successful results seem now to have been attained. 

 The plate accompanying my last paper (Ibis, 1901, plate ix.) 

 was executed by this process from a water-colour drawing, 

 but the figures in that accompanying the present paper 

 have been photographed from the eggs direct, without the 

 intervention of an artist, and, in fact, have not been touched 

 by hand. I give these particulars because this is undoubtedly 

 the first illustration of birds^ eggs executed by the new 

 process which has been published. 



The Plate contains figures of the eggs of the following 

 species : — 



(1) Chettusia leucura (Licht.). White-tailed Plover. 

 (PI. VI. figs. 1 & 2.) 



Nothing appears to have been known respecting the 

 nidification of this Plover until Mr. N. Zaruduy found it 

 breeding in Transcaspia, as stated below. It is a somewhat 

 rare species in South-eastern Europe, but nests in Trans- 



SER. VIII. VOL. II. N 



