2. Artijkial Green Sarroiindiuns. 

 Exi'EimiENTS XV.— XVIII. 



XV. 



Cylinder. 

 Hci()ht . . 179 mm. 

 Internal diam. 71 mm. 

 Approx. cap. 700 cc. 

 Bright green paper 



XVI. 



Lamp-shade. 

 Height . . 166 mm. 

 Approx. cap. 1200 cc. 



Kough twigs, chiefly 

 of Qnercus cerris and 



XVII. 



Lamp-shade. 

 Height . . 109 mm 

 Approx. cap. 700 cc 



XVIII. 



Lamp-shade. 

 Height . . 133 mm. 



spills intermixed with elm, enamelled dark 

 food-plant. i green, were intermixed 



[pprox. cap. Y uu cc. , •" ' „"" '""'• 



Smooth tvvigs of ,SV,^-.r -^^^"■«^- '"P.- JOO cc 

 uamelled dark green, | -^^^igs, chiefly rough, 



enamelled 

 as in XVI 

 mixed 



were inter 



July if. — 8 young , July 11. — 10 young 

 larvte introduced from ! larva introduced as in 

 "first stock," having XV. 

 been in green surround- 

 ings, the leaves be- i 

 coming rather bi'own 

 shortly before this ' 

 date. 



July 23. — More green 



spills added ; only 1 

 larvae alive ; all light 

 brown. 



July 31. —All large 

 in last stage but one ; 

 3 greenish, 1 light 

 brown. 2 were resting 

 on spills, 2 on leaves. 



Aug. 5. — All 4 rather 

 small in last stage : 

 2 brownisli green. 

 1 intermediate. 

 1 light grey. 



Aug. 12.— All dead. 



July 30. 

 (5 dark broivn, all at 

 beginning of last 

 stage, 

 3 green (not very 

 bright), 2 at begin- 

 ning of last stage, 

 1 changing last 

 skin. 



1 intermediate, 

 changing last skin. 



Aug. 5. — All in last 

 stage : 



2 bright green (dorsal 

 band distinct, & in 

 1 tending to spread 

 downwards), 



2 intermediate, 



3 (ireijigh brown (1 

 iiglit), 



3 deep brown. 

 Not a great difference 

 between the dark 

 forms ; none of them 

 very dark. 

 Aug. 12. 



2 green, 



3 intermediate, 



5 dark (although not 

 very dark). 



July 10. — 8 intro- 

 duced from "second 

 stock," having been 

 previously in green 

 surroundings, in dark- 

 ness by day, and illu- 

 minated by a lamp at 

 night. 

 July 25. 



1 green, 



I greenish, 



1 intermediate, 



5 brown. 



were enamelled light 

 green and intermixed. 



Aug. 7.— All in last 

 stage : 



1 bright green (faint 

 dorsal line), 



1 greenish intermedi- 

 ate, 



6 grey, like the 10 in 

 VI., only darker as 

 a whole, although 

 with much indi- 

 vidual difference. 



July 16. — 10 intro- 

 duced as in XVII. 



July 25. 

 3 green, 

 2 intermediate, 

 5 brown (not dark). 



July 31. 

 Laat stage : 

 2 bright green, 

 4 dull green, 

 2 darkish brown. 

 Last stage but one : 

 1 dull green, 

 1 intermediate. 



A ug. 5. — 3 larv!i> had 

 ceased feeding— 2 green 

 and 1 brown. 

 7 in last stage : 



5 green (1 small), 



1 intermediate, 



1 lifiht brown. 

 All the green larvie 

 wer rather dull, with 

 pronounced brown dor- 

 sal line. 



