1878.] ON LEPIDOFTERA FROM BILLITON. 63/ 



2. Catalogue of Lepidoptera collected by Mr. S. N. Walter 

 in the Island of Billiton. Rhopalocera by F. D. God- 

 man and Osbert Salvin; Heterocera by H. Druce. 



[Eeeeived May 17, 1878.] 



(Plate XL.) 

 RHOPALOCERA. 



That the Rhopalocerous fauna of Billiton should largely partake 

 of the character of that of the surrounding islands of Sumatra, Java, 

 and Borneo, and of the peninsula of Malacca was to be anticipated. 

 Of the thirty -three species represented in this collection (which was 

 made in Billiton by Mr. S. N. Walter, and has been sent to us by 

 Lord Tweeddale for examination), all but one are well-known forms 

 from one or all of these islands. The single exception, the Myrina, 

 described below, has, so far as is at present known, its sole repre- 

 sentative in a nearly allied species from Tenasserim, also described 

 in the present paper. 



The differential elements of the Butterfly faunas of Borneo, Su- 

 matra, Java, and Malacca have not yet been traced with sufficient 

 precision to enable us to say to which of the four localities the island 

 of Billiton has most affinity. With Borneo it is certainly very closely 

 allied ; but it possesses several species in common with Java, and 

 others with Malacca. Unfortunately our series of Sumatran Butter- 

 flies is not very complete ; but, so far as we can see, many species 

 are also found in that island, geographically its nearest neighbour. 



Fam. NymphaliDjE. 

 Subfam. Danaiisle. 



I. HESTIA CLARA. 



Hestia clara, Butl. Trans. Ent. Soc. ser. 3, v. p. 469. 



iHestia leuconoe, Druce, P. Z. S. 1873, p. 337. 



A single female specimen, agreeing with Mr. Butler's types in the 

 British Museum. The species also occurs in Borneo, whence we have 

 an example of the same sex. Its occurrence in Java is doubtful. 



2. DANAIS PHILOMELA. 



Euploza philomela, Zink. Nov. Act. Ac. Nat.-Cur. xv. p. 184, 

 pi. 16. f. 17 ; Druce, P. Z. S. 1873, p. 337. 

 Agrees with Malaccan and Bornean examples. 



3. Danais similis. 



Papilio similis, Linn. Syst. Nat. 



Danais similis, Druce, P. Z. S. 1873, p. 338. 



Identical with Malaccan and Javan examples. 



4. Danais juventa. 



Papilio juventa, Cr. Pap. Ex. pi. 188. f. B. 

 Danais juventa, Druce, P. Z. S. 1873, p. 337. 

 Agrees with Bornean specimens. 



