SOME FURTHER NOTES ON THE GENUS TERIAS. 281 



that they Vary from 1*4 to 1*7 inches, the female " type " expanding 

 1*6 inches, while of some twenty Javan and Sumatran specimens of 

 T, sari available to me, one expands only I'l inches and the 

 remainder vary from 1-5 to 1'9 inches. The only other character of 

 any importance given by Mr. Moore is the relative breadth of the 

 black margins on the upperside, and though, as far as the material 

 goes, Javan and Sumatran specimens are slightly more heavily marked 

 than specimens from Mergui and other parts of Burma, yet this 

 character is so well known to be eminently variable in other species 

 of the genus that it cannot be accepted as specific without the very 

 greatest hesitation. T. sari is a very constant and easily recognisable 

 species : it has on the underside only a single wavy line in the discoidal 

 cell of the forewing, in addition to the usual disco-cellular markings, 

 and the whole of the apex widely and evenly chocolate-brown, and also 

 has a more or less diffused dark spot towards the outer angle. 



" TEHIAS SILHETANA, Wallace." The Mergui specimens are 

 quite typical T. silhetana, which can be readily recognised by having 

 three markings in the discoidal cell on the underside, in addition to the 

 marking on the disco-cellular nervules, this being a character found 

 in no other described species of the genus. ' I may add that, since the 

 publication of my previous paper, Messrs. Davidson and Bell have bred 

 T. silhetana at Karwar in the Bombay Presidency, and have obtained 

 all its seasonal forms. They inform me that the caterpillar differs from 

 that of T. hecahe in having a black head instead of being uniformly 

 green, and further that it is gregarious in its habits, whereas the cater- 

 pillar of T. hecahe is solitary. 



" T. HECABEOIDES, Menetries." The Mergui specimens are 

 typical T. hecaheoidesj which grades into and is inseparable from 

 T. hecahe. 



" T. CONTUBERNALIS, n. sp." The Mergui specimens belong 

 to the ordinary dry-season form of T. hecahe, which has also been 

 described by Mr. Moore under the names T. excavata and T. simulata. 



" T. PATRUELIS, n. sp." This is also the ordinary dry-season 

 form of T. hecahe ; it has the dark marginal border on the upperside of 

 the hindwing rather narrower than in T. contuhernalis, but all the 

 specimens vary infer se. 



16 



