the colours of certain Lepidopteni. 483 



The colom-s of HIL, LIV., LV., and LXII., are figured in my 

 previous paper on the colours of pupie (Phil. Trans., Z. c, Plate 26, 

 figs. 16, 17, 18, and 21). The colours of all, except LVI., LIX., 

 and LXIII., were very opaque and uniform; those of the three 

 compartments just mentioned, being produced by tissue-paper 

 pasted on to white paper, were far less regular, and contained a 

 much larger admixture of white light. This was especially the 

 case in LIX., in which the white light greatly preponderated. 



These compartments were used in the experiments on Pieridce, 

 as well as Vanessidce. 



LXVII. and LXVIII. 2 compartments of a wooden box, 1'08 

 decimetres wide, '61 high, '47 deep, covered in with a clear glass 

 front. 



LXVII. was lined throughout with deep orange paper, similar 

 to LIV. 



LXVIII. was lined throughout with pale yellow paper, similar 

 toLV. 



LXIX. A glass cylinder, 7"2 centimetres diameter, 1'57 deci- 

 metres high, covered with 1 thickness of faded yellowish greeu 

 tissue-paper, and roof of same. Much white light passed tlirough, 

 as well as green. The paper was the same as that figured in Phil. 

 Trans., I. c, Plate 26, fig. 19. 



LXX. A glass cylinder, about 1*1 decimetres high, and rather 

 less diameter than LXIX. Similarly covered and roofed. 



G. Light transmitted through Coloured Glass or 



Gelatine. 



LXXI. A wooden box, 1*7 decimetres wide, 1-75 high, and 

 •6 deep, lined with white paper and covered with red glass 

 (" Hashed," viz., a clear glass with a red surface). 



Used for Pieridce as well as Vanessidce. 



LXXII. to LXXVI. Five compartments of a wooden box ; 3 of 

 them 7*5 centimetres wide, 9'8 high, 4'8 deep. 



Of these, LXXII. was covered with a sheet of red gelatine, the 

 interior being plain light coloured wood. When the Pier idee were 

 experimented with, the interior was lined with deep orange paper, 

 and the gelatine replaced by red glass, like that of LXXI. 



LXXIII. was covered with a sheet of bright green gelatine, the 

 interior plain. In the experiments on Pieridce, the gelatine was 

 replaced by blue glass, and the interior lined with deep orange 

 paper. 



LXXIV. was covered with a sheet of blue gelatine, the interior 

 being plain (not used with Pieridce). 



LXXV. was only 2'15 centimetres wide (otherwise similar). It 

 was covered with red glass like LXXI., the interior plain (not used 

 with Pieridce). 



LXXVI. was 2"22 decimetres wide (otherwise similar). It was 

 covered with a sheet of yellow glass, the interior plain. When 

 used with Pieridce the interior was lined with white paper. 



LXXVII. A wooden box, 2-53 decimetres square, I'do deep, 

 standing on one side. Quite three-fourths of area of top and 



