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Digital Guide to Moth Identification

Geometridae
91a0634 – 7046   Nemoria bistriaria Hübner, 1818
             Red-fringed Emerald

© Nolie Schneider
Description/
Field Marks:
At critical pre-emergence temperatures an intermediate green-brown form of Nemoria bistriaria will be induced with brown and green scales sprinkled across the wing in this manner. Nemoria lixaria is rarely seen north of SE Penna, and its seasonal darker form is melanic with charcoal black scales appearing along the pm. and am. lines and black shading on abdomen and wing fringes rather than the mocha brown form that appears in N. bistriaria. Given the locality and coloration there can be little doubt that this is an intermediate color form of Nemoria bistriaria, probably N. bistriaria siccifolia (in terms of Ferguson's subspecies). Neither N. mimosaria nor N. rubrifrontaria has a known seasonal color variant, and I think those are the only other two Nemoria that might be encountered in that part of Massachusetts. ~ John Gruber
Similar Species:
  • Pinned specimens of related species. (Hint: select View by Region on the related species page.)
Synonymy: Nemoria bistriaria Hübner, 1818
Aplodes brunnearia Packard, 1876
Aplodes rubrolinearia Packard, 1873
Geometra siccifolia Fitch, 1857
Aplodes rubromarginaria Packard, 1876
References
  • 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., 1985. Moths of America North of Mexico, Fascicle 18.1: p. 62; pl. 3.6-20. order or free PDF
  • Hall et al., 2021. The Moths of North Carolina - website (identification, habitats and life history)
  • Species Page at Block Island Moths
  • Species Page at BugGuide.Net
  • Species Page at Mass Moths
Nemoria bistriaria
© Mike Boone
Nemoria bistriaria
© Arlene Ripley
Nemoria bistriaria
© Peter Aron
Nemoria bistriaria
© Larry Line
Nemoria bistriaria
© Nolie Schneider
Nemoria bistriaria
© Ron Votaw
Nemoria bistriaria
© Mark Dreiling - DNA
Nemoria bistriaria
© Carol Wolf
Nemoria bistriaria
© Tom Murray
Nemoria bistriaria
LG – © Jim Troubridge
Nemoria bistriaria
22mm – © Jim Vargo
Nemoria bistriaria
22mm – © Jim Vargo

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