146 • William T. M. Forbes 



as a projecting point (trumpet-mine). The frass is ejected through 

 a small slit in the leaf. 



Pupa incomplete, of a low type, with segment 3, and possibly segment 

 2 free ; fairly well chitinized. Setae sometimes very heavy, i and ii 

 approximate on the movable segments. Dorsal spines fine, in one 

 patch, or in two patches of spines of unequal size ; sometimes with a 

 row of larger posterior spines (oak species). Cremaster of two heavy, 

 upcurved hooks. Head with large dorsal piece ; prothorax small ; maxil- 

 lae long, nearly covering palpi ; no maxillary palpi. 



There appears to be only a single genus north of Florida. It is 

 rather like the Tineidae but the early stages are specialized for leaf- 

 mining, and at the same time have some primitive characters. 



1. TISCHERIA Zeller 

 (With Coptotriche Walsingham) 



Characters of the family. In many species, the under side of the fore wing 

 is clothed with many fine spinules that may represent aculece, but they are too 

 coarse, and are more likely to be modified scales. Various sexual modifications 

 of the wing are common, the most extreme form being that of T. zelleriella, in 

 which the costa of the hind wing is notched, and the usual fringe replaced at the 

 notch by fine, short bristles. 



Key to the species 

 1. Nearly even dark gray. 



2. Scales evenly colored and quite purplish 2. aenea. 



2. Scales merely shining fuscous, with paler tips; a smaller species. 



1. malifoliella, 3. roseticola. 

 1. Fore wing powdered with blackish or with bands of powdering. 



2. Scattered small areas of black dusting 6. solidaginifoliella. 



2. Two oblique transverse fasciae 5. heliopsisella. 



2. Heavily dusted all over 4. ambrosiceella. 



1. Fore wing yellow, often broadly shaded with darker yellow, or with a very 

 little brown dusting; larvae on oak and chestnut. 

 2. Hind wing of male as wide as fore wing. 



3. Male with apical fringe notched 16. zelleriella. 



3. Male with fringe normal. 



4. Hind wing regularly lanceolate 15. sulphured. 



4. Hind wing widened at base, abruptly attenuate just beyond middle. 



14. clemensella. 

 2. Hind wing of male half as wide as fore wing. 



3. Male with a fuscous patch near base of fore wing below, and less marked 



ones on both sides of hind wing 12. citrinipennella. 



3. Male without such patches. 



4. A patch of fuscous scales at anal angle of fore wing above. 



5. Vertex deep brown; fore wing pale lemon yellow, apex reddish or 



brown, sometimes dusted with black 11. badiiella. 



5. Vertex concolorous; fore wing dull ochreous 10. tinctoriella. 



4. No such patch. 



5. Abdomen densely dusted beneath with fuscous brown on a pale yellow 



ground 9. castaneceella. 



5. Abdomen not dark dusted. 



