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 ULMIFOLIELLA. 
Plate CXXYI. Figure 5. 
Localities for this plentiful species are York, Lewes, 
Scarborough, Market Harborough, Pembury, Newcastle- 
on-Tyne, Manchester, Darlington, Bristol, Birkenhead, 
etc., etc. 
The situations where it is found are among birch 
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 CXXYI. Figure 6. 
Localities for this species are York, Scarborough, 
Brighton, Pembury, Huddersfield, Newcastle-on-Tyne, 
Bristol, Manchester, Darlington. 
The situations where it is found are among sallows. 
The perfect insect appears in May and August. 
