120 BULLETIN UNITED STATES GEOLOGICAL SURVEY. 



Leaf-miners of the under surface. 



Lithocolletis quercitorum, Frey & Boll. ' 



LithocoUetis fitchella, Clem. 



Lithocolletis basistrigella, Clem. 



Lithocolletis ceriferella, Clem. 



Lithocolletis quercipulchella, Cham. 



Lithocolletis quercialbella, Cham. > Tentiform mines. 



Lithocolletis fuscocostella, Cham. 



Lithocolletis albanotella, Cham. 



Lithocolletis obstrictella, Clem. 



Lithocolletis hageni, Frey & Boll. 



Lithocolletis argentifimbriella, Clem. 3 



Lithocolletis intermedia, Frey & Boll. Doubtful species. 



Lithocolletis mirifica, Frey & Boll. Doubtful species. 



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



Coriscium albanotella, Cbam. Large tentiform mine. 



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



Ypsolophus querciella, Cham. 



Gelechia querciella, Cham. 



Gelechia quercinigrwella, Cham. 



Gelechia qnercivorella, Cham. 



Gelechia quercifoliella, Cham. 



Gryptolechia quercicella, Clem. 



Machimia tentoriferella, Clem. Larva in a web. 



The following species feed in galls : — 



Ypsolophus quercipomonella, Cham. 



Gelechia galhvgenitella, Clem. 



Hamadryas bassettella, Clem. 



Blastobasis glandulella (Holcocera glandulclla Biley) feeds in acorns. 



Castanea Americana. Chestnut. 



Lithocolletis castanewella, 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 castanewella, Cham. Larva mines the upper surface of the 

 leaves. 



Nepticula castanafoliclla, Cham. Larva in crooked, linear mines in 

 the upper surface. 



Fagus sylvatica. Beech. 



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

 August and later. 



