TURDIDAE-MUSCICAPIDAE. 



PRATINCOLA RUBICOLA (L.). 



Dresser l ) mentions an egg with a yellowish white ground colour 

 (Collection: R. Chase, Birmingham), an aberration, thus, which like 

 the one referred to above in respect of titys shows an approach 

 to rubecula-eggs. 



MUSCICAPA GRISOLA L. 



The difference between the eggs of one set, mutually, is frequently 

 very great in the case of this species. Raspail 2 ), a French ornitho- 

 logist, describes a deviating set consisting of five eggs which not 

 only all differed in marking but particularly in ground colour from 

 each other; the ground colour was greyish white, reddish white, 

 bright bluish white, dirty white, and pale brown, respectively. 



Fig. 9 of plate 125 in Dr. Rey's work, showing an egg of which 

 the so-called cap has been deposited in an entirely abnormal manner 

 as regards its (position, is described, in my opinion incorrectly, as 

 a „ variety". 



1 ) 1. c. page 98. 



2 ) See : „Memoires de la Societe" Zoologique de France", tome V (1892) page 186. 



