228 Lilian J. Gould's expert 1110 Us 



June 21st. — The larvae were all brownish, and nearly 

 alike as to depth of colour. 



June 30th.— The second ecdysis occurred. The larvae 

 were constantly resting on the sticks, but did not ap- 

 proach them in colour ; only their general hue was 

 slightly darker than that of the larvae in green sur- 

 roundings, and quite different, as seen in PI. XL, fig. 6 

 {cf- fig. 7). 



July 12th.— The third ecdysis took place. The five 

 larvae still varied very little as to depth of colour ; the 

 brown colour took a pinkish tinge, which gradually in- 

 creased. 



July 28th. — The fourth ecdysis. During the stage 

 succeeding this moult the colour became intensified, and 

 attained its greatest perfection. This species seemed to 

 be susceptible to a later stage than others, in which the 

 protective resemblance to surroundings did not increase 

 very much after the fourth stage. 



July 29th.— I drew the darkest larva (PI. XL, fig. 6). 

 The largest larva, fully stretched, measured nearly 7 cm. 

 There was scarcely an appreciable difference of shade in 

 the five larvae. 



Aug. 3rd. — The larvae were now distinctly of a darker 

 general shade than those with green surroundings. Their 

 general ground colour was a brownish grey, or more 

 correctly, perhaps, a pinkish drab ; the heads were 

 tawny, marked with black ; the dorsal humps were black, 

 and the whole dorsal surface finely mottled with very 

 small dark specks. 



Aug. 10th. — The first larva was spinning up on the 

 floor between leaves. 



Aug. 16th. — The cover of the cylinder accidentally 

 slipped off, and two larvae escaped and could not be 

 found. 



Aug. 17th. — All the larvae had pupated. 



Total results of experiment :— 



Colour. No. of larvae. 



Brownish grey or pinkish drab 5 



Other colours 



Total 5 



The lance with green surroundings. 

 C/y/Z/uZcr 16.- June 13th.-I placed five larvae in the 

 first stage in cylinder 6, and gave young green shoots of 



