28 MR. À. R. WALLACE ON THE PAPILIONIDÆ 
that a species which on a continent might have a wide range, and whose local forms, if 
any, would be so connected together that it would be impossible to separate them, may 
become by isolation reduced to a number of such clearly defined and constant forms that 
we are obliged to count them as species. From this point of view, therefore, the superior 
number of Malayan species may be considered as apparent only. Its true superiority is 
shown, on the other hand, by the possession of three genera and twenty groups of Pa. | 
pilionidze against a single genus and eight groups in South America, and also by the 
much greater average size of the Malayan species. In most other families, however, the 
reverse is the case, the South American Nymphalide, Satyride, and Erycinide far sur- 
passing those of the East in number, variety, and beauty. 
The following list, exhibiting the range and distribution of each group, will enable us 
to study more easily their internal and external relations. 
Lange of the Groups of Malayan Papilionidæ. 
Ornithoptera. 
1. Priamus-group. Moluccas to Woodlark Island. 
2. Pompeus-group. Himalayas to New Guinea (Celebes, maximum). 
3. Brookeana-group. Sumatra and Borneo. | 
Papilio. 
4. Nox-group. North India, Java, and Philippines. 
5. Coon-group. North India to Java. 
6. Polydorus-group. India to New Guinea and Pacific. 
7. Ulysses-group. Celebes to New Caledonia. 
8. Peranthus-group. India to Timor and Moluccas (India, max.). 
9. Memnon-group. India to Timor and Moluccas (Java, max.). 
10. Helenus-group. Africa and India to New Guinea. 
ll. Pammon-group. India to Pacific and Australia. 
12. Erechtheus-group. Celebes to Australia, 
13. Demolion-group. India to Celebes. 
14. Erithonius-group. Africa, India, Australia, ; 
15. Paradoxa-group. India to Java (Borneo, max.). : 
16. Dissimilis-group. India to Timor (India, max.) 
17. Macareus-group. India to New Guinea, 
18. Antiphates-group. Widely distributed. 
19. Eurypylus-group. India to Australia. 
20. Leptocircus-group. India to Celebes. 
This Table shows the great affinity of the Malayan with the Indian Papilionidæ, only | 
three out of the nineteen groups ranging beyond, into Africa, Europe, or America. The : 
limitation of Sroups to the Indo-Malayan or Austro-Malayan divisions of the archi —— 
i (see * Journal of Linnean Society, 
ociety, 1863, p. 230), is much less « 
