tite colours of certain Lcpidoptcra. 



455 



May 27, 7 were on the black net roof, and 2 on the 

 plant, the rest havmg buried deeply in the loose peat. 



Mai/ 31, 10 buried, and had made cocoons ; these were 

 transferred as described below (p. 457) ; 1 was on plant, 

 and 4 on roof. 



JtDie 22, the remaining 5 had buried, and 1 had 

 pupated. They were transferred as described below 

 (p 457). 



Dark Surroundings. 



Exi'ETilMENT I. 



The floor of a larf;e 

 glass cylinder (of about 

 lOuO cc. capacity) was 

 black net resting on 

 black paper ; on this 

 floor many small lumps 

 of coal were scattered ; 

 the roof was black tis- 

 sue paper. 



Larvffi of "first lot." 



May 17. — 2 of the 

 lightest large larvas & 

 3 of the lightest small 

 introduced. 



May 24. — 3 escaped. 



July 15. — 1 had pu- 

 pated recently, the 

 other died. 



Any. 15. — Moth 

 emerged. 



E.XPERIMENT II. 



Arranged as in I. 



Larvse of "first lot. 



May 17. — 1 inter- 

 mediate large larva & 

 4 intermediate small 

 were introduced. 



May 24. — 2 escaped. 



July 7. — 1 had spun 

 a slight cocoon, and 

 pupated the following 

 day. 



July 15. — The re- 

 maining 2 were nearly 

 ready for pupation. 



Auy. 14. — Moth 

 found emerged. 



Auy. 26. — Moth 

 found emerged. 



Experiment III. 



Dark Surroundings 

 from May 27. 



Eectangular glass 

 case (LII., Appendix) 

 with floor of peat and 

 lumps of coal standmg 

 on black paper (below 

 glass bottom). 



Larvae of "first lot." 



May 27. — 6 of the 

 larvffi lost on May 24 

 were found on that day, 

 but of course original 

 arrangement was un- 

 known. They were 

 placed between 24th 

 and 27th on rock-rose 

 alone, with white paper 

 floor; on 27th intro- 

 duced here. 



June 23. — All buried, 

 and 1 had recently pu- 

 pated. 



July 8. — 1 dead. 

 2 pupre in cocoons. 

 1 larva ,, 



1 pupa in which imago 



was developing. 

 1 missing. 

 Aug. 3. — 1 imago 

 emerged. 



Aug. 15. — 2 imagos 

 emerged (1 probably 

 on 14th). 



Auy. 20. — 1 imago 

 had emerged. These 

 last 3 imagos emerged 

 from pupie in well- 

 made cocoons of peat. 



