12. Proboscis present (Cat. 13-18).
13. Hind wing with nervule 8 curved and almost touching 7 after end of cell; nervure 1a reaching anal angle .......... Fam. 12. Cymatophoridae, see p. [386].
14. Hind wing with nervule 8 remote from 7 after end of cell (Cat. 15-18).
15. Tarsi as short as tibia, hairy; stoutly built moths .......... Fam. 11. Notodontidae,[[237]] see p. [383].
16. Tarsi long and naked; slightly built moths (Cat. 17 and 18)
17. Fore wing with nervule 7 remote from 8, and generally stalked with 6 .......... Fam. 40. Epiplemidae, see p. [420].
18. Fore wing with nervule 7 given off from 8; hind wing with nervure 1a short or absent .......... Fam. 36. Geometridae, see p. [411].
B. Fore wing with nervule 5 coming from lower angle of cell or nearer 4 than 6 [see figures 161 and 162, pp. [318], [319]] (Categories 19-58).
19. Hind wing with more than 8 nervules (Cat. 20, 21).
20. Proboscis absent, no mandibles nor ligula; size not very small .......... Fam. 23. Hepialidae, see p. [396].