LEPIDOPTEROUS PUPH3 AND THEIR SURROUNDING SURFACES. 
417 
Results. — (a) Of the two pupae, one was fixed to the roof and the other horizontally 
to the side just below : both were (3), but light for this degree ; one distinctly pinkish, 
and one faintly yellowish-green, the latter very small and dwarfed. 
(/3) Of the three pupae, one was fixed to the roof, one about halfway up the side, 
and one near the bottom of the side ; all were (4), one faintly pinkish, one yellowish 
and dark, intermediate between this degree and (3), and one yellowish and much 
dwarfed. The pigment patches and dots were normal in two of the pupae. 
Although the two blinded larvae produced rather darker pupae, the differences were 
very slight indeed, and are quite insufficient to support the conclusion that the ocelli 
represent the part of the larva which is sensitive to these influences. The larvae 
remain quiet when blinded, like those of P. machaon, and are very well suited for 
this method of investigation. The effects of white surroundings are shown in the 
pupal colours. 
D. Strongly illuminated, but not equal to B. 
A little later another similar experiment was made, the same cylinders being used. 
Four larvae found on mignonette were placed in one cylinder, and three blinded larvae, 
also found on mignonette, were placed in the other. No notes were taken as to 
suspension, &c. Seven pupae were obtained. 
Results. —Of the four pupae which were produced from the normal larvae— 
1 was fixed to tfie roof, and was a . . . . (4), normal, brownish-pink ground-colour. 
3 were fixed horizontally to the side just 
beneath the roof, and of these .... 2 were (4), normal, both very faintly pinkish. 
1 was (5), of a pale dull green and more grey than usual, 
and more of the pigment patches, so that, as 
far as pigment is concerned, it would have 
been a somewhat dark (4). 
Of the three pupse which were produced from the blinded larvae— 
1 was fixed to the roof, and was a.(4), yellowish, with rather more of the pigment 
patches than usual; grey dusting normal. 
1 was fixed horizontally to the side, just beneath 
the roof, and was a.(4), very pale yellowish-pink, with an almost complete 
absence of pigment, except upon the rostrum ; 
so also very little grey dusting. Altogether, 
considerably lighter than normal. 
1 was fixed horizontally about halfway down the 
side, and it was a.(3), with a distinct dull-greenish ground-colour; it 
much resembled the (5) of the normal pupae, 
only the gr’ey dusting predominated, so that the 
green was largely concealed. Dusting normal 
for (3), black patches rather less than usual. 
3 H 
MDCCCLXXXVII. —B. 
