the cotom's of certain Lepidoptera. 



355 



G. SUKROUNDINGS OF OTHER CoLOURS. 

 Experiments XXXI.— XXXIV. 



XXXI. 



Lamp-shade. 

 Hehjlit . .131 mm. 

 Appro.v. cap. 700 cc. 



Many dark bine pa- 

 per spills intermixed 

 with food-plant and 

 surroundino; it. 



July 10. — 11 young 

 larvaa introduced from 

 the " first stock," hav- 

 ing been previously in 

 green surroundings, 

 which had become 

 somewhat dark to- 

 wards this date. 

 July 21. — 10 alive : 



9 brown, many dark ; 



1 greenish, the largest. 

 The general length was 

 about 19-0 mm. 



July 23. — More spills 

 added. 



July 31.— All 10 in 

 last stage, and all very 

 dark. They nearly al- 

 ways rest on the spills. 



XXXII. 



Cylinder. 

 Height . . 158 mm. 

 Internal diam. 71mm. 

 Appro.v. cap. (150 cc. 



Similar to XXXI., ex- 

 cept that the blue, al- 

 though pronounced, 

 was not so deep in tint. 



A uy. 3. — Uniformly 

 very dark purplish 

 brown, with hardly any 

 individual differences. 

 The 10 larva) were 

 nearly mature. A larva 

 was selected for paint- 

 ing. 



Any. 12. — Only one 

 feeding. All remained 

 very dark, as before. 



July 10. — 11 young 

 larvae introduced, as in 

 XXXI. 



July 21.— 10 alive : 

 9 brown, many dark ; 

 1 green (the largest 

 larva). 

 About 19'0 mm. is the 

 usual length. 



July 23.— More Idue 

 spills added. 

 July 31.— 

 9 small in last stage ; 

 all dark, but not so 

 dark as in XXXI. 

 1 green, not bright, but 

 with much brown on 

 back, and yellow 

 spots distinct on side 

 and beneath. This 

 is the largest, and 

 almost mature. 

 The larviB nearly al- 

 ways rest on the spills. 

 A7ig. f). — All in last 

 stage, and about ma- 

 ture. 

 1 yreenixh interme- 

 diate, 

 1 liyhtish yrcy, 

 4 deep rich 



brown, 

 4 blackish. 

 These larvte were very 

 dark, although nol 

 nearly so much so as 

 those of XXXI. 



Aug. 13. — All pu- 

 pating. 



XXXIII. 



Lamp-shade. 

 Height . . 133 mm. 

 Approx. cap. 700 cc. 



Many deep orange 

 paper spills and pieces 

 of paper similarly in- 

 termixed. 



July 9. — 12 young 

 larvae introduced, as in 

 XXXI. 



July 19. — Larger 

 larvte about 17'0 mm. 

 long. 



1 darkish brown, 

 11 vai'ying from green- 

 ish to brownish 

 green. 

 No bright green larva. 

 July 23. — More 

 orange spills added. 



1 brown, 

 11 green, some of them 

 greenish. 



July 31. — 12 all 

 green, although many 

 were not the brightest 

 green. They were near- 

 ly always f i lund resting 

 on the orange paper. 



Any. 12.— Many pu- 

 pating, and all 12 ma- 

 ture. All bi'ight green, 

 generally with but 

 slight dorsal line. 



XXXIV. 



Cylinder. 

 Height . . 180 mm. 

 Internal diam. 82 mm. 

 Approx. cap. 1000 cc. 

 Slany smooth twigs of 

 Salix enamelled deep 

 orange were similarly 

 intermixed. 



July 14. — 4 young 

 larvffi introduced, as in 

 XXXI. 



July 16. — G more 

 added from XIV. 



July 2,5. — ■ 

 7 green, 

 1 greenish, 

 1 intermediate, 

 1 brown. 



Any. 5. — All last 

 stage, nearly mature. 



7 bright green (only 1 

 with dorsal line dis- 

 tinct), 



2 intermediate, 



1 light broicn. 



