THE BUTTERFLIES OF SIAM. 109 



means "tlie giant butterfly ■'; it is the only butterfly in tlie country 

 wliicli has a distinctive name. 



2. Papilio zaleucus Hew. 



A few specimens of tliis butterfly were taken at Hup Bon in April 

 and May 1914. 



3. 1'apilio ADAMSO.M Grose-Smith. 



I took four specimens of this rare butterfly on the Petchaburi 

 River in 1910, but I have not come across it since. 



4. Papilio philoxenus polveuctes Dbldy. 



Recorded by Jordan from North Siam (Seitz, Macro-lep. 9, p. 32.) 



5. Papilio aristolociiiae goniopeltis Rothsch. 

 Widely distributed and fair!}^ plentiful everywhere. 



6. Papilio slateki makginata Oberth. 



According to Jordan (Seitz, Macro-lep. 9, p. 41.), this race 

 occurs in Central Siam in South Tonkin and the Shan States. Cnephas 

 Jord. is an aberrant female form from the lower Shan States. 



Bingham gives taroi/anus Btlr. as the Siamese race, but Jordan 

 restricts this to Tenasserim. 



I have not yet come across either form. 



7. Papilio clytia Linn. 



The following forms ofthisver}' variable species occur in Siam:-^ 

 CLYTIA Linn. panope Linn. 



PAPONE Westw. JANUS Fruhst. 



OSPAPE Moore. dissimilis Linn. 



The dissimilts form is now recorded for the first time ; the others 

 have already' been cited by Jordan. The janus form is unknown to me 

 in nature. According to my observations, chjtia is by far the com- 

 monest form in Siam. 



Jordan regards all these forms, whicli were formerly recognized 

 as species, as geographical races in the making. 



8. Papilio paradoxa telearchus Hew. 



I took a single specimen of this butterfly on the Petchabur; 

 River in April 1910, but have not met with it since. 



9. Papilio castor mahadeva Moore. 



Not common. Taken only on the Petchaburi River in the 

 month of April and at Muak Lek in July. 



vol. n, PEC. li'ic. 



