Abstract
Abstract On the basis of head capsule widths (HCWs) of field-collected and laboratory-reared larvae, the moth Gynaephora menyuanensis Yan & Chou (1997) (Lepidoptera: Lymantriidae) was first found to have six instars in the male and seven instars in the female. Mean HCWs were 0.68, 0.91, 1.22, 1.58, 2.06, 2.69, and 3.45 mm in field-collected larvae and 0.67, 0.87, 1.17, 1.54, 2.00, 2.59, and 3.24 mm in laboratory-reared larvae for first through seventh instars, respectively. Stadium duration, body length, and body mass of each instar also were examined. The first, second, third, fourth, fifth, sixth (♀, ♂), and seventh (♀) instars averaged 240.30, 15.32, 14.58, 14.74, 13.86, 15.90 (♂), 13.65 (♀) and 16.28 (♀) d in stadium duration; 3.95, 4.96, 6.07, 9.14, 13.31, 17.23, and 25.79 mm in body length; and 1.33, 3.46, 7.79, 17.32, 45.05, 103.07, and 217.24 mg in body mass under the field conditions. Analyses of the results showed highly significant exponential correlations of HCW with body length and body mass,...
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