Light reflected from 

 backgrounds. 



Effects produced. 



-Imphidasis Other sensi- 

 betularia. the larvie. 



Pupae. 



Vanessa 



iirticrv, 



18SG and 



later. 



iPicris bran- 



I sicfe and /'. 



rapte. 1886 



I and 1888. 



Bright green 'paper (ar- Light 



senito of copper;. Con- brown & 



siderable absorj^tion of red, greenish 



orange, and yellow, very larvte 



slight of green ; extreme (probably 



blue absent and the rest poisoned 



dimmed (LVII. and spills). by the 

 pigment) 



Pale bluish green paper. 

 The same paper, rendered 

 paler (probably as the effect 

 of damp), was used with the 

 experiments on Fieridce in 

 1886. The siDectrum, as 

 described in Phil. Trans. 

 (1887, B, p. 430), is very 

 similar. 



Darkgreoienainel (paint- Darkish 

 ed on twigs). Ked, orange, larvte 



and yellow darkened, blue predomi- 

 wanting ; slight absorption nate. 

 of green. 



Dark dull green paper. 

 Some general absorption, 

 least in green, most in 

 blue, considerable in yellow, 

 orange, and red (LVIIL). 



Verg pale blue tis.fue- 

 paper, on a background of 

 white paper. Some slight 

 absorption of red, yellow, 

 and orange ; the rest of 

 si)ectruni unchanged (LIX.) 



Light blue paper. All 

 blue unabsorbed, and all 

 other i^arts considerably 

 weakened, but much less 

 so than below (LX.). 



Deej) blue paper. Great 

 absorption of all except 

 blue (LXL, blue spills). 



Dark 

 larvie. 



Darkish 

 pupre. 



Dark 

 pupffi. 



Green 

 pupsB, 

 but not 



the 

 n-eenest. 



Dark 

 pupas. 



Dark 

 pupie. 



Dark 



pup£e, 

 P. bras- 

 sicce; in- 

 terme- 

 diate P. 



rupee. 



Dark 



pup:e 



(P. bra.-^ 



sic(e). 



Dark ct 

 inter- 

 media' e 

 pupae. 



Darkish 



IJUpiB (P. 



brassiccc) 



Dark 

 pupto (P. 

 brutiaiccc) 



Other 

 pupae. 



