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Digital Guide to Moth Identification

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

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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: bistriaria Hübner, 1818 (Nemoria) - MONA 1983: 7046 ssp. a. bistriaria Hübner, 1818 (Nemoria) - MONA 1983: 7046  brunnearia (Packard, 1876) (Aplodes)  rubrolinearia (Packard, 1873) (Aplodes) ssp. b. siccifolia (Fitch, 1857) (Geometra)  rubromarginaria (Packard, 1876) (Aplodes)

References (Caution: DNA barcoding at BOLD provides evidence of relatedness, not proof of identification; some BOLD specimens shown may not be sequenced.)

Barcode of Life (BOLD) 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

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