EURASIAN & AUSTRALIAN NEPTINI 15 



MIMICRY 



Batesian mimicry of a high order is shown in the Papuan subregion by the species 

 of the Neptis praslini group, which mimic the Danain genus Tellervo, and in Timor 

 by Phaedyma mimetica which mimics the Danain genus Euploea. In China Aldania 

 imitans is a passable mimic of Danaits sita (Kollar) ; A. raddei, though vaguely 

 Danain-like, has no model co-existing with it and does not appear to be a mimic. 

 It is possible that the forms of Pantoporia venilia and Phaedyma ampliata with 

 obsolete or obsolescent markings are examples of incipient mimics. 



ACKNOWLEDGEMENTS 



The fine collection of Neptini in the British Museum (Natural History) has formed 

 the basis of my investigation. Of the 427 taxa listed in this paper only 22 are 

 unrepresented in it. I wish to thank the Trustees for permission to examine and 

 rearrange the collection, for the loan of material and for the use of the library. 

 Many members of the Museum staff have helped me in one way or another, and I 

 wish particularly to thank Mr. T. G. Howarth (South Kensington) and Mr. G. E. 

 Tite (Tring) for much patient kindness. Mr. N. D. Riley, as always, has been 

 ready to lend his great authority to the solution of any problem I took to him. 

 Lt. Col. C. F. Cowan has answered many queries with unfailing promptitude. 

 I owe particular thanks to Professor Dr. T. Shirozu of the University of Kyushu 

 who has helped me with information and whose generous gift of rare Formosan 

 species has greatly enriched the national collection. Dr. P. Viette (Paris), Dr. A. 

 Diakonoff (Leiden) and Dr. H. J. Hannemann (Berlin) kindly lent me types of 

 butterflies in their care whose identity could not otherwise have been determined, 

 and the first also permitted me to examine the Fruhstorfer collection in the Museum 

 national d' Histoire naturelle. Mr. E. Taylor kindly arranged the loan of material 

 from the University Museum, Oxford. Mr. N. Jumalon of the University of San 

 Carlos, Cebu City, helped me with information about Philippine forms and I was 

 able to examine some of his captures, a number of which he has generously presented 

 to the British Museum (Natural History). Dr. T. Norman and Lt. Col. J. C. S. 

 Marsh have helped me with information concerning the forms occurring in Assam 

 and Hong Kong respectively. 



Keys to the Genera and Species 



The terms used in this and the following section to describe the external markings are 

 illustrated in Text-fig. 1. 



Key to the Genera 



1 Clasp with ampulla and harpe terminally fused and more or less rounded . . 2 



- Clasp with ampulla and harpe clearly differentiated, the former with a terminal 

 process ........ 



Fore wing with vein 10 arising from vein 7 



Fore wing with vein 10 arising from cell 



Fore wing with vein 10 arising from near base of vein 7 



Fore wing with vein 10 arising from cell 



PANTOPORIA (p. 25) 



. LASIPPA (p. 42) 



ALDANIA (p. 130) 



4 



