172 THE MALAYAN PAPILIONIDE AS 
and P. Polydorus of the Moluccas. This fact I shall 
recur to again, as I think it helps us to understand 
something of the causes that may have brought about 
the phenomenon we are considering. Neither do the 
genera Ornithoptera and Leptocircus exhibit any traces 
of this peculiar form. In several other families of 
Butterflies this characteristic form reappears in a few 
species. In the Pieride the following species, all 
peculiar to Celebes, exhibit it distinctly :— 
1. Pieris Eperia ... + compared with P. Coronis (Java). 
2. Thyca Zebuda... a8 ss »  Thyca Descombesi 
(India). 
3. T. Rosenbergii ie 3 » T. Hyparete (Java). 
4, Tachyris Hombronii ... By » ‘'T. Lyncida. 
5. T. Lycaste... wee 8 » T. Lyncida. 
6. T. Zarinda ae sit “5 » T. Nero (Malacca). 
7. T. Ithome aa oe 8 », ‘T. Nephele. 
8. Eronia tritea ... ia 6 ,» Hrcnia Valeria 
(Java). 
9 Iphias Glaucippe, var. 5 » Iphias Glaucippe 
(Java). 
The species of Terias, one or two Pieris, and the genus 
Callidryas do not exhibit any perceptible change of 
form. ; 
In the other families there are but few similar 
examples. The following are all that I can find in my 
collection :— 
Cethosia dole .. compared with Cethosia Biblis (Java). 
Hurhinia megalonice a » Hurhinia Polynice 
(Borneo). 
Limenitis Limire ... a » Limenitis Procris 
; (Java). 
Cynthia Arsinoé, var. Pe » Cynthia Arsinoé (Java, 
Sumatra, Borneo) 
