190 Journal of the F.M.S. Museums. I Vol. X, 



{E. a. singapura), which appears to l)e confined to Singa- 

 pore. This Pahang male, however, and a female bearing 

 the same localitj' label approximate the Siamese form in 

 having the hind-marginal spots on the hind wing much 

 reduced. It is evidently a variable species and it would 

 probably be more correct to make the aegyptus group of 

 forms subspecies of midamus. Distant's description and 

 figure of E. chloe from Province Wellesley, Malacca and 

 Singapore, suggest connecting links between the two. His 

 figure of margarita shows pale blue spots on fore wing 

 which I have not seen in Malay Peninsula examples of this 

 species. 



47. Euploea crassa Butl, crassa Bull. 



Enploea kliioi crassa Fruhslorfer 1910, p. 271, flg. 19c. 



Euploea crassa Fnihstorfer 1911, p. 278. ' 



Enploea crassa Distant 1882, p. 29, Tab. V, flg. 8^ 



Loc. Kedah (Distant). 



Distant's single specimen from Kedah appears to be 

 the only record of the species in the Malaysian subregion. 

 The typical form occurs in Siam and Indo-China, with sub- 

 species in India and Ceylon. The elongated pale violet 

 apical spots in the fore wing, practically connected with 

 well-defined whitish spots on the apical half of the hind- 

 margin, render this species easy to distinguish from the 

 other species of this subgenus. 



48. Euploea diocletianus Fab. diocletiamis Fab. 



Euploea diocletianus diocletianus Fruhstorfer 1910, p. 271. 

 Euploea diocletianus Distant 1882, p. 28, Tab. IV, flgs. 4 A 5. 



A common butterfly throughout the Malay Peninsula. 



In a series of 78 males out of 80 specimens from the 

 F.M.S. Museums the only variation to be noticed is in the 

 small white post-cellular spot of the fore wing upper side. 

 This varies in size ; is absent altogether in one from Kelan- 

 tan ; in others it is well-formed and triangular in shape, 

 while in a few there is a second spot below it. 



E. diocletianus is typically a Malaysian butterfly, with 

 the following subspecies recognized in our subregion : — 



/•r. d. diocletianus Fab. Malay Peninsula, Sumatra 



(and Siam to Burma and 

 Assam). 



E. d. lowi Butl. Borneo. 



E. d. aerithus Fruhst. Natuna Is. 



E. d. alcidice Godt. Java. 



E. d. schreiberi Butl. Nias I. 



E. d. schildi Fruhst. Batu Is, 



One other subspecies occurs in Northern India, 



111 addition to the foregoing species of this subgenus 

 occurring in the Malay Peninsula the following species are 

 recorded from the Malaysian subregion, although not from 

 the Malay Peninsula ; — 



