( 369 ) 



XI] I. The Colour-relation hctwcen the 'pujpm of Papilio 

 machaon, Pieris napi and many other species, and 

 th'j surroundings of the larvm lyreparing to inqmte, etc. 

 By F. Mereifield, F.E.S., and Edward B. Poul- 

 TON, M.A., F.R.S., etc., Hope Professor of Zoology 

 in the University of Oxford. 



[Read October 5tli, 1898.] 

 ^4,_I]S[TR0DUCT0RY. (F. Merrifield and E. B. Poulton.) 

 £.- EXPERIMENTS UPON THE PUPiE OF Papilio machaon. 



1. Experiments upon the Summer Pupss of Papilio machaon. 



(F. M.) 



2. Results of the above Experiments. (E. B. P.) 



3. Experiments upon the Winter Fnpae of Papilio laachaon. 



(F. M.) 



4. Residts of the above Experiments. (E. B. P.) 



5. Mr. C. V. A. Peel's Winter Pupae of Papilio machaon 



described. (E. B. P.) 

 6'.— EXPERIMENTS UPON THE PUP.E OF Papilio poda- 



lirius. (Cora B. Sanders and E. B. P.) 

 D.— EXPERIMENTS UPON THE PUP^ OF Pieris napi. 



1 . Experiments upon the Winter Pupx of Pieris napi. (F. M.) 



2. Results of the above Experiments. (E. B. P.) 



i'.— EXPERIMENTS UPON THE PUPiE OF Pieris brassier. 



1. Experiments upon the Winter Pupae of Pieris brassicee. 



(F. M.) 



2. Results of the above Experiments. (E. B. P.) 



3. Experiments upon the Winter Pupae of Pieris brassicoe. 



(E. B. P.) 



4. Experiments ttnth conflicting colours upon the Winter Pupae 



of Pieris brassicoe. (E. B. P.) 

 J'.— NOTES ON THE STRUGGLE FOR EXISTENCE IN 



THE LARViE OF Pieris brassicae. (E. B. P.) 

 G!.— EXPERIMENTS UPON THE PUP^ OF Pieris rapse. 



1. Experiments upon the Winter Pupae of Pieris rapse. (F. M.) 



2. Results of the above Experiments. (E. B. P.) 



TRANS. ENT. SOC. LOND. 1899.— PART IV. (DEC.) 25 



