47 



The perfect insect appears at the end of June, in July, 

 and the beginning of August and September. 

 It feeds on the oak. 



YPSOLOPHA SYLVELLA. 

 Plate GUI. Figure 3. 



Localities for this species are Brighton, Market Har- 

 borough. 



The situations where it is found are among oaks. 



The perfect insect appears in August and September. 



The date of the appearance of the caterpillar is in 

 June. 



It feeds on the oak. 



YPSOLOPHA ALPELLA. 

 Plate GUI. Figure 4. 



Localities for this species are near Lewes. 



The situations where it is found are among oaks. 



The perfect insect appears in August. 



YPSOLOPHA LUCELLA. 

 Plate GUI. Figure 5. 



Localities for this species are Lewes, etc., etc. 

 The perfect insect appears in July. 



