40 U-S. NATIONAL MUSEUM BULLETIN 257 



6. Males with strongly asymmetrical valvac Gatesclarkeana 



Right and left valva similar, though hairing may be asymmetrical . . 7 



7. Uncus and gnathos united into a large rounded pad, with two pairs of pend- 



ing processes upon it, and with a narrow annular connection with anellus; 



sterigma bilobed Sycacantha 



Uncus not united with gnathos or absent 8 



8. Uncus well developed, clavate or pointed 9 



Uncus absent or represented by a pencil of hairs 14 



9. Tegumen with uncus long, gradually narrowed; valva simple, elongate-oval, 



moderately curved, with a rounded top. 



Hedya (subgenera Hedya and Platypeplus) 

 Tegumen long, if gradually narrowed, then valva not simple 10 



10. Uncus pointed, gnathos very strong, porrected, with two diverging apical 



horns Gnathmocerodes, new genus 



Uncus clavate 11 



11. Valva narrow, cucuUus with a projection of ventral side 12 



Valva broad, cucuUus without a ventral projection 13 



12. Projection of valva subapical or postmedian Statherotis 



Projection of valva submedian Olethreutes 



13. Uncus with a fringe of spines Bactra 



Uncus without such fringe Phaecadophora 



14. Uncus represented by a pencil of hairs Cryptaspasma 



Uncus entirely absent 15 



15. Valva triangular, narrowed towards rounded top . Bubonoxena, new genus 

 Valva elongate, dilated towards bilobate top . . Loboschiza, new genus 



16. Palpus in male modified, enlarged, triangular, terminal segment apparently 



absent, a slender black pencil of hairs from forehead . . Eucoenogenes 

 Palpus in male not thus modified 17 



17. Greenish, in male basal segment of antenna thickened and notched. 



Peridaedala 

 Not greenish, male antenna normal 18 



18. Corpus bursae in female modified, with a characteristic sclerotised upper edge. 



Erinaea 

 Corpus bursae not so modified 19 



19. Male genitalia of olethreutine type, uncus developed; valva with large spines 



along edge of sacculus .... Hedya (subgenus Cellifera, new subgenus) 

 Male genitalia of eucosmine type, uncus absent 20 



20. Valva with a digitoid process from disc below base of costa. 



Costosa, new genus 

 Valva without such process 21 



21. Gnathos distinct, or reduced to lateral rods or to a membranous transverse 



structure 22 



Gnathos entirely absent Cryptophlebia 



22. Gnathos reduced to lateral rods, cucuUus moderate, its stalk not narrow, 



forewing with veins 4 and 5 separate, never connate Eucosma 



Gnathos membranous, cucuUus large, broadly semioval, its stalk narrow; 

 forewing with veins 4 and 5 connate or closely approximated . Petrova 



23. Socii present, distinct lobes 24 



Socii entirely absent 25 



24. Sacculus broadly triangular, cucuUus narrowed at base to a stalk. 



Crocidosema 

 Sacculus moderate, cucuUus not so narrowed at base . . . Strepslcrates 



