480 L. de Niceville & Dr. L. Martin — Butterflies of Sumatra. [No. 3, 



discal orange band of the female; the wing is also narrower and the 

 outer margin stiaighter. Underside, both icings as in the female. 



Grose Smith. In Sumatra it occurs rarely in the Battak mountains 

 and at Selesseh in July, August and October. 



482. Biduanda thesmia, Hewitson. 



Grose Smith. Staudinger. Distant. Very common in the forests 

 from the plains to the elevation of liekantschan, and occurs all the year 

 round. Both sexes rest on the buds of some moderately high shrub, 

 with the head mostly downwards. It occurs exactly in the same locali- 

 ties and is quite as common as Marmessus moorei, Distant, which it. 

 greatly resembles. If one species mimics the other it would be difficult 

 to say which is the model and which the one that copies it. 



483. *Biduanda estella, Hewitson. 



Hewitson. Grose Smith. Kirby. Both sexes originally described 

 from Sumatra. As Hewitson does not mention any secondary sexual 

 characters in the male, aud the inner margin of the forewing as des- 

 cribed and figured is straight instead of bowed outwardly, it is more 

 than probable that it does not come into the genus Biduanda, as that 

 genus possesses male secondary sexual characters, but in the absence of 

 specimens I do not know where else to place it. 



484. Biduanda sc^va, Hewitson. 



Originally described from Singapore. In Sumatra it is found only 

 in the mountains at higher elevations, where it flies throughout the 

 year, as Dr. Martin possesses specimens from every month. It must 

 be very common under favourable conditions, as one collector once 

 brought in a consignment of sixty specimens. The female is very rare. 



485. Biduanda nicevillei, Doherty. 



First discovered in Burma. Very rare in the Battak mountains, 

 Dr. Martin possesses three females only taken in January, March and 

 December. Dr. Martin thus describes his specimens, the female being 

 hitherto unknown. " Female. Expanse : 1-35 inches. Upperside, 

 forewing brown, in the middle somewhat brighter, more reddish. Cilia 

 dark brown. Hindwing with two subanal black spots, somewhat con- 

 fluent, bordered inwardly by a large pure white area which occupies 

 the posterior half of the wing ; a fine anteciliary black line. Cilia 

 white. Tails three, white. Underside, both ivings as in the male." 



486. Biduanda cinesioides, de Niceville. 



Originally described from the Malay Peninsula. Is not as rare as 



