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 fasciae; 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 fasciae; 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 denned. 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. 67 mm. 



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

 larvae 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. 6.57 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 fasciae; 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 



Saliva spp., willow: 



L. scudderella. Tentiform mine on underside of leaf. 



L. salidvorella-. Tentiform mine on underside of leaf. 



L. salicifoliella. Tentiform mine on underside of leaf. 

 Populus alba, silver-leaved poplar: 



L. populiella. Small, tentiform, underside mine. 

 Populus spp., poplar : 



L. salicifoliella. Rather large, tentiform, underside mine. 

 Myrioa carolinensis, bayberry: 



L. picturatella. Upper side, blotch mine. 

 Juglans cinerea, butternut: 



L. caryaefoliella. 

 Juglans nigra, walnut: 



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



