240 



The perfect insect appears in May and August. 



The date of the appearance of the caterpillar is in 

 July and September. 



It feeds on the upper side of the leaf of the horn- 

 beam. 



LITHOCOLLETIS ULMIFOLTELLA. 

 Plate CXXYI. Figure 5. 



Localities for this plentiful species are York, Scarborough, 

 Lewes, Market Harborough, Pembury, Newcastle-on-Tyne, 

 Manchester, Darlington, Bristol, Birkenhead, etc., etc. 



The situations where it is found are amon birch 



O 



trees. 



The perfect insect appears in May and August. 



The date of the appearance of the caterpillar is in 

 July and September. 



It feeds on the birch, the under side of the leaf. 



LITHOCOLLETIS SINICOLELLA. 

 Plate CXXVI. Figure 6. 



Localities for this species are York, Scarborough, 

 Brighton, Bristol, Huddersfield, Newcastle-on-Tyne, Pem- 

 bury, Manchester, Darlington. 



The situations where it is found are among sallows. 



The perfect insect appears in May and August. 



