120 BULLETIN UNITED STATES GEOLOGICAL SURVEY. 



Leaf -miners of the under surface. 



Lithocolletis quercitorum, Frey & Boll, "i 



IAthocolletis fitchella, Clein. 



Lithocolletis basistrigella, Clem. 



Lithocolletis (vrifcrella, Clem. 



Lithocolletis qnercipulchella, Cham. 



Ljithocolletis quercialbella , Cham. )> Tentiform mines. 



Lithocolletis fuscocostella, Cham. 



Lithocolletis albanotella, Cham. 



Lithocolletis obstrictella, Clem. 



Lithocolletis hageni, Frey & Boll. 



Ljithocolletis argentijiinbriella, Clem. 3 



Lithocolletis intermedia, Frey & Boll. Doubtful species. 



Lithocolletis mirifica, Frey & Boll. Doubtful species. 



Ornix qiiercifoliella, Cham. Uuder edge of leaf turned down. 



Coriscium albanotella, Cham. Large tentiform mine. 



The following species either roll, fold, or sew the leaves together: — 



Ypsolophus querciella, Cham. 



Gelechia qiierciella, Cham. 



Gelechia quercinigrwella, Cham. 



Gelechia quercivorella, Cham. 



Gelechia quercifoliella, Cham. 



Cryptolechia quercicella, Clem. 



Machimia tentoriferella, Clem. Larva in a web. 



The following species feed in galls : — 



Ypsolophus quercipomonella, Cham. 



Gelechia galUcgenitella, Clem. 



Hamadryas bassettella, Clem. 



Blastobasis glandulella (Holcocera glandulella Eiley) feeds in acorns. 



Castanea Americana. Chestnut. 



Lithocolletis castaneceella, Cham. Larva in a blotch upper-surface 

 mine in the leaves. 



Lithocolletis, sp. ? Imago unknown. Larva in tentiform mine in 

 under surface of leaves. 



Bucculatrix trifasciella, Clem. The larva probably feeds on it. 



Tischeria castanea'ella, Cham. Larva mines the upper surface of the 

 leaves. 



Nepticiila castanafoliella, Cham. Larva in crooked, linear mines in 

 the upper surface. 



Fagus sylvatica. Beech. 



Cryptolechia faginella, Cham. The larva sews together the leaves in 

 August and later. 



