Figure 4. Wing modifications obtained in the F₁ and F₂ generations.

An individual in (b) and (c) is from the F₂ generation. All others are from the F₁ generation. The yellow arrows indicate a modified portion of the hindwings. The red arrowheads indicate gaps of background colouration. (a) Normal type. (b) Dorsoventral transformation (DV). (c) High magnification of (b). (d) DV with a background gap (BG) between the anterior and posterior areas. (e) BG. (f) Weak contrast (WC) between the spots and the background. (g) Disarrangement of spots (DS). (h) Reduction of spots (RS) with BG. The spots located in the anterior part are reduced. (i, j) RS (an identical individual). The third and fourth spot arrays are reduced. (k, l) RS (an identical individual). All spots throughout the hindwing are reduced. (m) Loss of spots (LS) with BG. The spots located in the posterior part are lost. (n) LS. The spots located in the anterior part are lost. (o) LS. The third and fourth spots are almost completely lost. (p, q) Fusion of spots (FS) and LS. (r) FS. (s) Ectopic spot (ES). (t) High magnification of the ectopic spot in (s).