Reference:
MCCLELLAN, Q. C.; LOGAN, J. A. Instar determination for the gypsy moth (Lepidoptera: Lymantriidae) based on the frequency distribution of head capsule widths. Environmental Entomology, 1994, 23.2: 248-253.URL:
https://www.deepdyve.com/lp/oxford-university-press/instar-determination-for-the-gypsy-moth-lepidoptera-lymantriidae-based-m2S0vcc1w3?articleList=%2Fsearch%3Fquery%3DInstar%2BDetermination%2Bfor%2Bthe%2BGypsy%2BMothLiterature
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