1G8 THE MALAYAN PAPILIONIDJE AS 



the anterior wings, different from that of the allied 

 species and varieties of all the surrounding islands ; 

 6. Tailed species in India or the Indian region become 

 tailless as they spread eastward through the archi- 

 pelago ; 7. In Amboyna and Ceram the females of 

 several species are dull -coloured, while in the adjacent 

 islands they are more brilliant. 



Local variation of Size. Having preserved the finest 

 and largest specimens of Butterflies in my own col- 

 lection, and having always taken for comparison the 

 largest specimens of the same sex, I believe that the 

 tables I now give are sufficiently exact. The differences 

 of expanse of wings are in most cases very great, and 

 are much more conspicuous in the specimens themselves 

 than on paper. It will be seen that no less than four- 

 teen Papilionida3 inhabiting Celebes and the Moluccas 

 are from one- third to one-half greater in extent of wing 

 than the allied species representing them in Java, Su- 

 matra, and Borneo. Six species inhabiting Amboyna 

 are larger than the closely allied forms of the northern 

 Moluccas and New Guinea by about one-sixth. These 

 include almost every case in which closely allied 

 species can be compared. 



Species of Papilionidae of the Closely allied species of Java and 



Moluccas and Celebes (large). the Indian region (small). 



Expanse. Expanse. 



Inches. Inches. 



Ornithoptera Helena f O. Pompeus 5'8 



Amboyna) 7 '6 { O. Amphrisius 6'0 



Papilio Adamantius 



(Celebes) 5'8 



P. Lorquinianus (Mo- 

 luccas) 4'8 



P. Peranthus 3'8 



