200 WILLIAM T. M. FORBES 



Carya spp., hickory : 



L. caryaealbella. Tentiform, underside mine; dense, ovoid cocoon of frass and 



silk. 

 L. olitacfonnis. Tentiform, underside mine; dense, ovoid cocoon of frass and 



silk. 



L. caryaefoliella. Upper side irregular, blotch mines, often confluent. 

 Corylus americana, hazelnut: 



L. corylisella. Upper side, irregular blotch mine. 

 Ostrya virginiana, hop hornbeam: 



L. obscuricostella. Small, slightly wrinkled, tentiform, underside mine; pupa 



in a slight, silken web. 

 L. ostryaefoliella. Underside mine, larger than that of preceding species and 



more wrinkled; ovoid cocoon of frass and silk. 

 L. tritcenianella. Upper side, blotch mine; epidermis of leaf white, speckled, 



and later, much wrinkled and leaf folded. 

 L. lentella. Brownish, upper-side, blotch mines, often containing several larvae; 



epidermis of leaf in numerous longitudinal ridges; leaf folded. 

 L. ostryarella. Irregular, flat, upper-side, blotch mines, usually containing 



several larvae; hibernating chamber outlined by a circular ridge. 

 Carpinus carolvniana, ironwood: 



L. ostryarella,. (Described under Ostrya.) 

 Betula spp., birch : 



L. martiella. Narrow, tentiform, underside mine. 

 L. lentella. (Described under Ostrya.) 



L. betulivora. Small, nearly circular, upper-side, blotch mine. 

 Alnus spp., alder: 



L. auronitens. Underside, rather large, tentiform mine. 

 Castanea dentata, chestnut: 



L. kearfottella. Rather small, narrow, tentiform, underside mine, between 



veins. 

 Many upper-side miners on oak are also often found on chestnut. These mines 



are described under Quercus. 

 Quercus spp., oaks : 



Underside, tentiform mines : 



L. fitchella. Large, tentiform mine; epidermis of leaf slightly and finely 



wrinkled; most commonly on Q. macrocarpa and Q. bicolor. 

 L. hageni. Mine similar to that of fitchella. 

 L. rileyella. 

 L. quercialbella. 



L. argentifimbriella. Especially on white oak, Q. alba. 

 L. albanotella. Small mine, usually near margin ; epidermis of leaf with 



numerous, distinct, longitudinal ridges; especially on Q. bicolor and Q. 



macrocarpa. 

 L. ceriferella. Tentiform, wrinkled mine; ovoid cocoon of frass and silk; 



especially on chestnut oak and shingle oak (Q. imbricaria) . 

 L. basistrigella. Rectangular, transparent, scarcely wrinkled mine; flat 



cocoon outlined by ring of frass. 

 Upper-side blotches or flat broad tracts. 



L. liamadryadella. Whitish, irregular, blotch mine. 



L. cincinnatiella. Large, brownish blotches; larvae usually gregarious; prin- 

 cipally on white oak. 

 L. macrocarpella. Blotch mine. 



L. conglomeratella. Blotch mine, especially on live oak (Q. virginiana). 

 L. quercivorella. Small, blotch mine, usually near the tip of a lobe, especially 



on red oak (Q. rubra) . 



