Figure 34.

The jumping spider Cosmophasis thalassina possesses a combination of a first-order diffraction grating and an underlying broad-band multilayer reflector. The diffraction grating causes one spectral component to be selectively directed away from the direction of incident illumination. The laminar structure beneath produces a broad-band (‘white’) reflectance, and with a significant proportion of the green light being removed from the incident white light by the grating, the reflectance observed at most angles is magenta (white minus green). From Parker & Hegedus (2003).