Figure 1

Body shape and antennal shape of Ichneumon extensorius and I. gracilicornis . I. extensorius (A, C, E) is a representative of species with a compact body shape, I. gracilicornis (B, D, F) represents the group of slender body shapes. The antennae of the former are shortened, stout, and the apical antennomeres are broadened; the antennae of the latter are relatively long and with the terminal antennomeres longer than wide.