hetweeii lepidopteo^otcs larvie and their surroitndings. 



323 



Reddish-brown 

 twigs. 



j 17 young larviE 14 young larvte 

 introduced. introduced. 



VI. 



Lichen-covered 

 sticks. 



All 17 evidently 

 becoming brown 

 like the twigs. 



(June 9.) Re- fed. 



VII. 



Weathered pale grey 

 barkless twigs. 



VIII. 



Green leaves and 



shoots of food -plant 



(Populus nigra). 



(June 3.) 15 

 young larv.'e in- 

 troduced. 



Brown like the 

 twigs. 



As before. 14 

 on twigs, 2 on 

 gi'cen, 1 uncertain. 



14 larvffi ; vari- 

 able, with no 

 marked resem- 

 blance to lichen. 



Apparently be- 

 coming light 

 brownish and ap- 

 I^roaching colour 

 of twigs. 



I All 17 on twigs. 

 They become much 

 lighter when 

 changing skin. 



17 on twigs. 

 Distinctly brown, 

 and not purplish 

 like III and IV. 



10 on sticks, 4 

 on green. Some 

 distinctly varie- 

 gated light and 

 dark brown, but 

 no green marks 

 yet. 



(June 18.) 13 

 on twigs, 1 on 

 muslin roof, 1 on 

 green. All closely 

 resemble twigs. 



15 young larvae 

 introduced. 



All 1 5 very 

 pale brown 



IX. 



Orange paper 

 spills. 



15 young larvae 

 introduced. 



(June 22.) 10 

 on twigs, 1 on 

 muslin, 3 on green. 



9 on sticks, 5 

 on green. Larvae 

 still very varie- 



(Junel7.) All 

 15 very pale 

 brown, some 

 faintly greenish. 



6 on spills, 1 

 on muslin roof, 

 8 on green. All 

 very light brown. 



(June 22). As 14 on spills, 1 



before 



13 on twigs, 1 

 on green. 



16 on twigs, 1 

 on green. All 

 brown as before. 



on green. Colour 

 as before. 



12 on sticks, 2 

 on green. A few 

 dark but mostly 

 light and varie- 

 gated with shades 

 of brown. 



16 on twigs, 

 I on green. 



12 on sticks, 2 

 on green. Two 

 larvae variegated 

 with dark green : 

 the rest as before, 

 but darker brown. 



All 14 light grey 

 and harmonizing 

 perfectly with 



twigs. 



13 on sticks, 1 

 on green. 4 larvae 

 with dark green 

 patches, strongly 

 develojjed in 2 of 

 them. 



10 on twigs, 4 

 on green. 1 larva 

 injured. Apjiear- 

 ance as before. 



11 on twig.s, 2 

 on green. 



14 larvae. All 

 very light 

 brown, but not 

 greenish . 



All 15 on spills. 

 Larvae resemble 

 VlII, only not 

 qiiite so light. 



11 on spills, 4 

 on green. Very 

 light yellowish- 

 brown. 



12 on spills, 3 

 on green. 



