Vol. xli.] 148 



the result of age-transition, i.e., gradual assumption or loss 

 of pigment. 



The arrangement of the pigmentation in eggs of L. collnrio 

 shows considerable variation, zoned or banded eggs pre- 

 dominating. These are frequently composed of bold 

 markings, and sometimes of very minute markings, generally 

 above the greater axis. These zones are in some cases 

 dense with sharply defined edges, giving them a remarkably 

 handsome appearance, in others the markings are scattered 

 at the edges of the zones. The modified forms have evenly 

 distributed, very minute markings confined to the broader 

 axis, and rarely to the extreme large ends. Eggs showing 

 evenly distributed markings, of which I show two clutches, 

 nuist be considered unusual. Almost unmarked eggs occur. 



WoODCHAT {Lanius senator). A representative series o£ 

 twelve clutches from Spain, Holland, etc., these do not differ 

 greatly from eggs of L. collurio, the greenish-ground form, 

 however, predominates. 



Masked Shrike {Lanius nuhicus). A clutch of five 

 typical eggs from Mersina, Asia Minor, May 7, 1919 

 (Dresser) ; these are distinctive and cannot be confused 

 with tliose of the other members of the genus. 



Ground-colour pale yellowish buff; markings pale brown; 

 under-lying markings ash-grey ; arrangement of markings, 

 zoned. 



Spotted Flycatcher (Muscicapa grisola). A series of 

 twenty-four clutches showing great variation, among them 

 two clutches of five showing true erythrism, Kent and 

 Kadnor; a clutch of five umarked resembling M. atricajnlla 

 eoofs. a clutch of five resembling those of S. ruhicola, 

 Northants. 



Brown Flycatcher {Alseonaxlatirostrh). Two clutches 

 of five from Fugi Hondo, Japan, May 14, 1897, and 

 May 17, 1898 ; these are self-coloured eggs of greenish- 

 buff slightly tinged with rufous, and there are no mottlings 

 visible even to the aided eye. The texture is coarse and 

 moderately glossy. 



Pied Flycatcher {Muscicapa atricapilla). A series of 

 fourteen clutches from Northumberland and Radnor, these are 



