118 



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



It feeds on the cudweed ? ( GnapJialium 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 second segment yellowish brown 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. 



