207 



The situations where it is found are heaths. 



The perfect insect appears at the end of August and in 

 September. 



The caterpillar feeds on the hirch (?) and the heath, 

 ( ' Cattuna vulgaris). 



LARENTIA DIDYMARIA. 

 TWIN-SPOT CARPET. 

 Plate XXVIII. Figure 6. 



THIS insect measures an inch or a little over in expanse. 



Male: fore wings dark greyish-brown with a slight 

 tinge of reddish, crossed with several darker lines, a dark 

 greyish-brown band in the middle, another at the inner 

 corner. Third line whitish and jagged, with two brownish 

 black blots. Hind wings greyish-brown, darker broadly 

 on the outer margin. 



Localities for this very common species are York, Brigh- 

 ton, Humberstone, Faversham, Barnstaple, Exeter. 



The perfect insect appears in June and July. 



The caterpillar is pale green, with a narrow white line 

 on the sides. 



The date of the appearance of the caterpillar is in April. 



It feeds on the chervil ( Cheerophyttum aureumj. 



