Figure 3.

Reflectance spectra of (a) male and (b) female Pieris rapae rapae and (c)–(j) SEM of single scales. The reflectance spectra 1–4 are from single scales, taken from wing locations shown by the numbers in the insets of figure 1a,b, of the dorsal forewing (1), dorsal hindwing (2), ventral forewing (3) and ventral hindwing (4). The single-scale reflectance spectra were measured from an area indicated by the square in the inset in (a). The spectra of (a) correspond to the male SEM photographs (c)–(f), and the spectra of (b) correspond to the female SEM photographs (g)–(j), as indicated. Scale bars, 20 μm (inset (a)) and 1 μm ((c)–(j)).