Family Drepanidae: Hook-tip moths
| Diagnosis: Tympana (ear) on second
abdominal segment; fw apex often falcate; hw with Sc+R parallel with Rs
or convergent with a cross vein at about 2/3 length of discal cell.
Diversity: Worldwide there are three subfamilies, 123 genera and 665 species; North America has nine genera and 20 species; five species representing five genera occur in North Dakota. Checklist numbers: 6235- 6255. Biology: Larvae are usually arboreal, feeding nocturnally and resting by day in leaf rolls or ties. Adults rest with wings ‘roof-like’ over abdomen or with wings spread, held off the substrate but flexed posteriad.
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| Further reading:
Forbes, William T. M. Drepanoidea, pp. 684- 691 in, Ibid. 1923. Lepidoptera of New York and neighboring states. Part I. Primitive forms, Microlepidoptera, Pyraloids, Bombyces. Cornell Agric. Exp. Sta. Mem. 68: 729 pp. __________. 1936. The classification of the Thyatiridae (Lepidoptera). Ann. Entomol. Soc. Amer. 29: 779- 803. Minet, Joël and Malcolm J. Scoble. Chapter 17. The Drepanoid/ Geometroid assemblage, pp. 301- 320 in Kristensen, Neils P. ed. 1999. Lepidoptera, moths and butterflies. Part 35, Vol. 1 in Handbook of Zoology. Maximilian Fischer ed. Walter de Gryter, New York. 491 pp. Scoble, Malcom J. 1992. The Higher Ditrysia, Chapter 12, pp. 290- 341 in The Lepidoptera: form, function, and diversity. Oxford Univ. press. 1982. 404 pp.
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