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Figure 2


Fig. 2. Sex differences (A,C,E,G, males; B,D,F,H, females) in wing color pattern, eyeshine, eye reflectance spectra and visual pigment absorbance spectra. (A,B) (A) UV-reflecting scales (iridescent purple) on the lower forewing and outer hindwing margins of males, (B) Non-UV-reflecting scales on wings of females. Reflectance spectra of both male and female dorsal wings are shown elsewhere (Bernard and Remington, 1991). (C,D) Eyeshine from the dorsal eye of (C) a male and (D) a female showing strongly sexually dimorphic coloration. (E,F) Analysis of experimental reflectance spectra (black dots) from dorsal eye ommatidia of (E) males and (F) females, based on a computational model of pigment content; spectrum was obtained after having stripped the visual pigment with {lambda}max=568 nm (P568) (red circles, female only); metarhodopsin 495 nm (orange squares); 437 nm (green diamonds), retinoid-binding protein 395 nm (dark blue diamonds); and 360 nm (light blue diamonds). (G,H) Absorbance spectra for the visual pigments estimated from epimicrospectrophotometry in the dorsal eyes of males (E, {lambda}max=437 nm and 360 nm) and females (F, {lambda}max=568 nm, 437 nm and 360 nm).