Figure 4

Wing reflectance and absorbance spectra of the American Rubyspot damselfly, Hetaerina americana. (a) Reflectance spectrum measured with a bifurcated fiber optic probe for clear, unpigmented, and red-pigmented wing pieces. (b) Absorbance spectrum measured by MSP for a window membrane from a section of the red-pigmented wing part, immersed in a fluid with a refractive index of 1.60. MSP, microspectrophotometry.