TORTRICINA [aoaw 



the most variable known LepidopUm), that they are difficult to 

 understand without considerable experience; and the specific 

 distinctness of certain forms is still not satisfactorily ascer- 

 tained. Hence a tabulation of the species is more than usually 

 troublesome to make, and more than usual caution will be 

 required in its application. 



1. Apex of forewings appearing subfalcate 19. contaminana. 



» i> not appearing subfalcate . 2. 



2. Forewings green . . . .6. lilcnma. 



,, not green . . . .3. 



3. Forewings with triangular white costal spot 24. hohniana. 



„ without such spot . . .4. 



4. Head dark, thorax pale . . . .5. 

 Head and thorax eoncolorous . . .6. 



5. Hindwings whitish -fuscous, forewings reddish - 



ochreous . . .14. permutana. 



„ grey, forewings ochreous to blackish 



13. varieqana. 



6. Forewings with extremely large central tuft 1. crikana. 



„ with central tuft not extremely large . 7. 



7. Costa of forewings distinctly roughened with scales 8. 



». „ not roughened with scales . 13. 



8. Termen of forewings sinuate . . .9. 



» „ not sinuate . . .12. 



9. Termen of forewings moderately oblique . 10. 



» » l'ttle oblique . 12. logiana. 



10. Costa of forewings faintly concave . 2. hastiana. 



i) ,, not concave . . .11. 



11. Forewings with large submedian tuft . 3. vmbrwna. 



„ with tufts all slight . . 5. sponsana. 



12. Species larger, grey-whitish . . T. niveana. 



„ smaller, grey or white . . 8. boseana. 



13. Forewings with one or more tufts well-marked . 14. 



„ with tufts all slight or absent . .17. 



14. Hindwings grey-whitish .' . 20. skepiherdana. 



grey . . . . .15. 



15. Costa of forewings faintly concave; species larger Hi. 



i) „ faintly convex; species smaller 



17. comariana. 



16. Forewings pale reddish-brown to dark fuscous 



15. perplexana. 

 „ ochrcous-grcy to ochrcous-brown 



1 6 schalleriana. 



