Lepidoptera of New York and Neighboring States 199 



often uniting to form a third, nearly straight fascia. Apex velvety black, pre- 

 ceded by a few silvery scales. 7-8 mm. 



Mine a broad, branched tract, usually Y-shaped, often crossing midrib, on leaves 

 of oaks, most commonly chestnut oak. Passes the winter in pupal state, con- 

 trary to the usual habit of species of this group. 



68. L. aesculisella Chambers. Reddish ocherous; a faint, whitish streak from 

 base of inner margin to fold; two fascise; the first fascia and its dark margin 

 broken near costa, slightly angulated, and its dorsal arm more oblique than the 

 second fascia, the latter being nearly straight. At two-thirds, a costal spot and an 

 opposite, longer, dorsal streak. 8-9 mm. 



Central United States. 



Mine a broad, linear tract, on leaves of buckeye, Aesculus glabra and A. octandra; 

 often containing several larvae. 



69. L. hamameliella Busck. Deep reddish orange; an oblique white streak from 

 base of inner margin to fold; two straight, oblique, silvery fascise; a silvery spot 

 at two-thirds; a long, very oblique, opposite, dorsal streak, parallel to termen, 

 uniting in apex of' wing with a short apical streak. Marginal line in cilia dis- 

 tinct. 7 mm. 



Mine a whitish blotch on leaves of witch-hazel, Hamamelis virginiana. 



70. L. aceriella Clemens. Fore wings reddish ocherous; markings as in pre- 

 ceding species, except that dorsal streak at tornus is usually less oblique and 

 marginal line in cilia not defined. 7-9 mm. 



Mine a flat, broad tract, in leaves of maple, most commonly red maple. 



71. L. ostryarella Chambers. Markings of the general character of the three 

 preceding species, but distinguished as follows: first fascia concave outwardly on 

 fold, more oblique than second ; dorsal streak at tornus oblique ; apex dusted 

 with dark "brown. 6-7 mm. 



Irregular blotch mines on hop hornbeam (Ostrya) and ironwood (Carpinus) ; 

 larvse sometimes gregarious; hibernating chamber of winter outlined by a raised, 

 circular ridge. 



72. L. corylisella Chambers. Distinguished from the preceding species by the 

 erect, dorsal streak at tornus. 6.5-7 mm. 



Blotch mines on upper side of leaves of hazel, Corylus americana. 



73. L. tubiferella Clemens. Head white; wings deep ocherous, with two straight, 

 slightly oblique, white fascise; no costal or dorsal streaks; sometimes a minute, 

 white spot in the apex. 7.5-8 mm. 



Mine a very characteristic tract, gradually increasing in breadth, on leaves 

 of oaks. Larva placed transversely in the mine. 



Synopsis of species of Lithocolletis by food plants 



Salix spp., willow: 



L. scudderella. Tentiform mine on underside of leaf. 



L. salicivorella. Tentiform mine on underside of leaf. 



L. saUcifoliella. Tentiform mine on underside of leaf. 

 Populus alba, silver-leaved poplar : 



L. populiella. Small, tentiform, underside mine. 

 Populus spp., poplar : 



L. saUcifoliella. Bather large, tentiform, underside mine. 

 Myrica carolinensis, bayberry: 



L. picturatella. Upper side, blotch mine. 

 Juglans cinerea, butternut : 



L. caryaefoliella. 

 Juglans nigra, walnut: 



L. caryaefoliella. Upper side, irregular, blotch mine. 



