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Nematocampa resistaria

910676.00 — 7010 — Nematocampa resistaria (Herrich-Schäffer, [1856]) — Horned Spanworm Moth
With pupal exuviae and final molt

Larval Host(s)

Presumed main host
on Block Island:

Known hosts:
unclear/unknown

Polyphagous (woody plants)

Sex Differences

Wing shape moderately sexually dimorphic, with forewing with more falcate tip and hindwing more pointed in female; female with paler ground color. Some individuals seem intermediate in these characters and are difficult to sex.

Life History

Flies mainly in July on Block Island, with records as late as mid-September. In this survey, the earliest adult record of the species was on 1 July (2019), but Mark Mello recorded the species on Block Island 5 June 1999. Overwinters as a caterpillar; immatures are most often seen as final instars shortly before and during the flight season.

References

  • Species Page at Moth Photographers Group
  • Barcode of Life (BOLD) - Caution: Some specimens shown may not be sequenced. DNA barcode provides evidence of relatedness not proof of identification.
  • Ferguson, D. C., 2008. Moths of America North of Mexico, Fascicle 17.2: p. 29; pl. 1.4-7. order or free PDF
  • Hall et al., 2021. The Moths of North Carolina - website (identification, habitats and life history)
  • Hulst, G.D., 1900. New species of Lepidoptera. Journal of the New York Entomological Society, 8(4): 218.
  • Powell, J. A. & P. A. Opler, 2009. Moths of Western North America, Pl. 31.7m; p. 220. Book Review and ordering
  • Species Page at BugGuide
  • Species Page at E. H. Strickland Museum

    • Adult phenology on Block Island of Nematocampa resistaria

    Abundance data late May to early October