190].] L. de Niceville — Butterflies of the subgenus liVongSL. 35 



pi. xxxix, fig. 1, male (1886) ; Tronga crameri marsdeni, Fruhstorfer, Berl. Ent. 

 Zeitsch., vol. xliii, p. 188 (1898). 



Habitat : Singapore (Moore) ; Singapore (Distant) ; Singapore 

 (Fruhstorfer). 



Mr. Distant allows this species full specific rank, and says he has 

 received two specimens from Singapore, which both differ from the type 

 specimen described by Dr. Moore from the same island, which shews 

 that this " species " is as variable as most of the other species in the 

 subgenus. In my opinion it is a synonym of T. crameri^ Lucas, which 

 species (as E. bremerij Felder), has been recorded by several authors 

 from numerous localities in the Malayan Peninsula. It is highly 

 improbably that Singapore island, which has hardly a scrap of virgin 

 forest remaining, has a distinct species of Tronga to itself. Dr. Moore 

 says that it is " An intermediate form between T. hremeri^ Felder, and 

 T. crameri, Lucas." 



9. Tronga olivaoea, Moore. 



T. olivacea, Moore, Proc. Zool. Soc. Lond., 1883, p. 267, n. 5 ; id., Fruhstorfer, 

 Berl. Ent. Zeitsch., vol. xliii, p. 189 (1898). 



Habitat: Minthantoung, Thoungyeeu valley, Tenasserira (Moore). 



This species was described from a single very small female 

 specimen. Dr. Moore in Lep. Ind., p. 76, admits that it is a *' small 

 var." of T. hremeri, Felder, which itself is a synonym of T. crameri, 

 Lucas. 



10. Teonga niasica, Moore. 



T. niasica, Moore, Proc. Zool. Soc. Lond., 1883, p. 267, n. 7 ; idem, id., Lep. 

 Ind., vol. i, p. 79 (1890) ; Bwplaia niasica, Kheil, Rhop. Nias, p. 17, n. 13, pi. i, 

 fig. 2, female (1884) ; Tronga pryeri niasica, Fruhstorfer, Berl. Ent. Zeitsch, vol, xliii, 

 p. 189 (1898). 



Habitat: Nias Island, W. coast of Sumatra (Moore) ; Nias (Kheil) ; 

 Nias (Fruhstorfer). 



I have eight males, but no females, of this species. The markings 

 are more constant than usual, though they vary considerably in detail, 

 for instance, the submarginal dots on the hindwing may form a com- 

 plete series or may be reduced to a solitary spot, and there are 

 intergrades between these two extremes ; the spots on the fore wing 

 vary also in size and number. The species may, perhaps, be kept 

 distinct, as the spots in the forewing are more uniform in size than in 

 the other species of the subgenus known to me, except T. frauenfeldii, 

 Felder, in which they are constantly smaller. 



