51. Antennae filiform .......... Fam. 37. Noctuidae, see p. [414].
52. Hind wing with nervule 8 curved and nearly or quite touching nervure 7, or anastomosing with it after origin of nervules 6 and 7 (Cat. 53-58).
53. Hind wing with nervure 1c absent (Cat. 54-57).
54. Hind wing with nervule 8 with a precostal spur .......... Fam. 24. Callidulidae, see p. [400].
55. Hind wing with nervule 8 with no precostal spur (Cat. 56, 57).
56. Hind wing with nervure 1a absent or very short .......... Fam. 25. Drepanidae, see p. [400].
57. Hind wing with nervure 1a almost or quite reaching anal angle .......... Fam. 28. Thyrididae, see p. [404].
58. Hind wing with nervure 1c present .......... Fam. 41. Pyralidae, see p. [420].
C. Fore wing with 4 nervules arising from the cell at almost even distances apart (Cat. 59-66).
59. Wings not divided into plumes (Cat. 60-63).