146 THE MOTHS OF THE BRITISH ISLES. 



Scarce Silver Lines {Hylophila bicolorand). 



The green colour of the fore wings of this moth is rather paler 

 than of those of the last species ; they are crossed by two 

 almost parallel yellowish lines ; hind wings white and silky. 

 Antennie whitish towards the tip and reddish towards the base 



(Plate 73). 



Caterpillar green, sometimes tinged with yellow, a dark line 

 along the middle of the back is edged on each side with whitish. 



The chrysalis is pale greenish, with a narrow black stripe 

 from the head along the thorax extending to the fourth abdo- 

 minal ring ; the wing cases reach the sixth ring, which together 

 with the back of the fifth are roughened with fine blackish 

 points. 



Cocoon boat-shaped with the keel raised at the head end. 

 When the moth emerges from this end the cocoon closes up 

 tightly again, so that no opening is to be seen ; slight pressure 

 on the back will cause the exit slit to open. 



This rather local species is perhaps commoner in the eastern 

 counties of England than elsewhere, but it occurs in the oak 

 woods of Berkshire, and southward to Kent and Hampshire. 

 Much scarcer in the west and midlands, and apparently 

 unknown in the north. Barrett gives Galway and Queen's 

 County in Ireland, but adds that it is rare. 



Distributed over Central and Southern Europe, and its range 



SARROTHRIPIN^. 



The Large Marbled Tortrix {Sarrothripa revayana). 

 This is a most variable species, ranging from greyish white 

 through various shades of brown to blackish ; the grey and the 



