Lepidoptera of New York and Neighboring States 321 



The family as it now stands is undoubtedly heterogeneous, being 

 comprised of various reduced Gelechioidea, with perhaps a couple of 

 genera which really belong to other superfaruilies. The forms with 

 1st A preserved, or with a primitive pupa, are evidently correlated 

 with the CEcophorida? ; others, like Ithome, seem to be derived from the 

 Geleehiidas by reduction; Batrachedra and ISynallagma are most doubt- 

 ful in position. A few genera of other families have been added to the 

 key for convenience. 



Key to Hie genera 



1. Hind wing immaculate; maxillary palpi minute, close-scaled. 

 2. Fore wing with one or more veins lost. 

 3. Cell set obliquely in the wing (tig. 186), squarely truncate at end, between 

 R 4+5 and Cu l3 cubital branches almost invariably running straight across 

 to dorsal margin, much shorter than M 3 . 

 4. Fore wing with Rj and R 5 stalked; hind wing narrow -lanceolate. 



12. Blastodacna. 

 4. Rt and R 5 completely united; hind wing linear (figs. 186, 190)'. 



13. Batrachedra.^ 



3. Cell central in the wing, the closing vein strongly oblique and nearly 



parallel to the dorsal margin from M 2 to Cu 2 ; M 3 to Cu 2 rather evenly 



spaced, subequal, and parallel. 



4. A radial vein lost; only four veins running to costa; fore wing falcate. 



15. Synallagma. 

 4. One or more dorsal veins absent; R 2 always present. 

 5. R 3 more or less stalked ; Mj often stalked. - 

 6. Wings broad; hind wing lanceolate and slightly trapezoidal, with 



two M's lost, and M a connate with Cu\ (Gelechiidfe — Helice.i 



6. Wings linear; hind wing with all veins preserved. 



( Heliodinida? — Erineda. ) 



5. R 3 free ; M x stalked ■ 11. Chrysopeleia. 



2. Fore wing with complete venation (cell always central, with oblique end). 

 3. Mj stalked (tig. 185). 

 4. Scape of antenna as long as width of head, without a pecten; antennae 

 longer, more slender. Fore wing with a silver streak in the apex; Cu- 

 arising less than three-fourths way out on the cell; M 2 stalked (fig. 



185) 14. Cosmopteryx. 



4. Scape half as long as width of head, pecten variable; antenna! usually 

 only four-fifths as long as fore wing, fore wing without a white streak 

 in the apex; with Cu 2 arising more than three -fourths way out. 

 5. Fore wing with heavy, raised, metallic tufts; Mi stalked nearly to 



apex ; M 2 free 4. Stilbosis. 



5. Fore wing with small, inconspicuous tufts, or none, M 1 shortly stalked 

 unless M 2 is also stalked. 23 



6. Wing dull, linear; pecten strong 7. Pyroderces. 



6. Wing shining, lanceolate; pecten absent. 



9 Stagmatophora, 10. Ithome. 



22 Coleopliora may be sought here, but is distinguished by its antennae thrown forward 

 in repose, its slender fore tibia without epiphysis at the middle ; its upper spurs of the 

 hind tibia above the middle, and its more angular-looking palpi. 



23 Laverna sexnotella also normally has M, very short-stalked, bul the second segment 

 of the palpus is much thickened, the wing has metallic tufts, anil there is a weak pecten. 



11 



