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The date of the appearance of the caterpillar is in May. 
It feeds on the cudweed ? (Gnaphalium arenarium) 
the common filago (Filago germanica), and the worm¬ 
wood (Artemisia campestris). 
PLEUROTA BICOSTELLA. 
Plate CXII. Figure 8. 
Localities for this common species are York, Richmond in 
Yorkshire, Scarborough, Lewes, Cambridge, Birkenhead, 
Manchester, Newcastle-on-Tyne. 
The situations where it is found are heaths. 
The perfect insect appears at the end of May, and in 
June and July. 
The caterpillar is pinkish grey, with a brownish line 
along the back, and another of the same colour below 
it on each side ; the spots small and blackish ; the head 
yellowish brown; the secondsegmentyellowishbrown with 
some darker markings on its hinder part. 
It feeds on the heath (Erica cinerea). 
The chrysalis is found in a web attached to the food 
plant of the larva. 
HARPELLA GEOFFRELLA. 
Plate CXII. Figure 9. 
Localities for this species are Scarborough, Lewes, 
Bristol, Kingsbury, Manchester, Tenterden. 
The situations where it is found are hedges and woods. 
