336 William T. M. Forbes 



(aside from the .JEgeriidas) ; but I believe it represents natural points 

 of division. The whole series of isolated genera has been put here 

 in the Yponomeutiche ; some of them are nearly Heliodinid while others 

 would go as well in the neighborhood of the Tineidse. 



Key to genera of Yponomeutoidea (except ^Egeriidse ) M 



1. Venation complete or nearly so. 



2. Fore wing with five radials preserved, all running to costa (fig. 219). 



3. Wings lanceolate, hind wing immaculate HI. Euclemensia. 



3. Wings linear; hind wing banded H 4. Idioglossa. 



3. Wings linear, hind wing immaculate H 3. Erineda. 



2. Fore wing with onlv four radials running to costa. 

 3. Hind wing with M t and M 2 long-stalked (fig. 201). 



4. Palpi with a triangular tuft on second joint; maxillary palpi porrect and 



often large Y 6. Plutella. 



4. Palpi nearly smooth. 



5. Head with a few erect hairs behind; maxillary palpi folded. 



Y 9. Acrolepia. 

 5. Head with a large tuft on vertex; maxillary palpi obsolete. 



Y 10. Argyresthia. 

 3. Hind wing with M. l and M, separate; or a vein wholly lost. 



4. R t arising bevond middle of cell, which is lanceolate; without accessory 



cell ' Y 12. Scythris. 



4. Cell ample, with large accessory cell; R x almost always arising before 

 middle of cell. 

 5. Palpi very short, drooping (fig. 222); hind wing lanceolate; M 3 long- 

 stalked or united with Ci^ (fig. 218) H 2. Heliodines. 



5. Palpi upturned at least at middle of front; or wings ample, usually 

 both. 

 6. Hind wing with complete venation (6 veins arising from cell). 

 7. Witli M, and CUj separate or connate. 



8. Vestiture hairy; palpi obsolete (Psychkke-Solenobia). 



8. Vestiture mostly scaly, palpi well developed. 

 9. Hind tibiae bristled. 



10. Hind tibiae bristled both above and below; R of hind wing 



ending at or above apex (fig. 204) Y 8. Epermenia. 



10. Hind tibiae bristled above only; R running to outer margin 



(fig. 220) * H 6. Schreckensteinia. 



9. Hind tibia 1 with long loose hair. 



10. Palpi short, hardly exceeding front Y 5. Urodus. 



10. Palpi upturned to vertex (Xylorietidse-Stenoma). 



9. Hind tibia? smooth-scaled. 

 10. Palpi nearly smooth. 



11. Hind wing with M :: and CUj separate (fig. 198); fringe 

 less than half as wide as membrane; ocelli small. 



Y 4 Atte-<"> 

 11. Hind wing with M ;i and C^ approximate (fig. 214); ocelli 

 very large. 

 12. Palpi with second and third Joints equal (brown). 



G 4. Glyphipteryx. 



=1 In this key the letters prefixed to the genus numbers indicate the families: Y== 

 Yponomeutidse ; G == Glyphipterygidw ; H = Heliodinidae. 



