ISOTEINON. 83 



specimen and on both sides in the other, a third between the second and 

 third median nervules in one specimen, and a fourth between the first and 

 second in the other all ochreous-white. 



9 . Upperside, both wings much lighter than in the male. Forewing 

 with the spots much larger and more numerous, there being an additional 

 subapical one, a very minute dot just in front of the third median nervule, 

 both semi-transparent and a third opaque yellow one (present in one male), 

 touching the submedian nervure in front, and the third discal spot being 

 quadrate with the inner and outer ends roundly emarginate. Underside both 

 wings with the dark markings more distinct than in the male. Forewing 

 devoid of the ashy patch and fringe of setae seen in the opposite sex. 



Hindwing with two dots behind the costal nervure instead of one, one 

 in the cell, and another between the second and third median nervules on 

 one side only so minute as to be scarcely discernible. 



Expanse : $ 1*4, $ 1*5 inches. 



Allied to 7. flavipennis, de Niceville, but differs in markings and 

 notably in the colour of the ground of the underside, which is pale vandyke 

 brown in /. microstictum and ferruginous ochreous in 7. flavipennis. 



Two males 26th and 2yth May, and one female 28th May, Silcuri, 

 [CacharJ ." (Wood-mason and de Niceville, I. c.) 



In collection Indian Museum. 



121. ISOTEINON FLAVALUM, DE NICEVILLE. 



Isoteinon flavalum, de Niceville, P. Z.S., 1887, p. 463, pi. xi, fig. 10, </. 



" Male. Upperside : both wings dark brown. Forewing with three 

 small subapical increasing spots, the upper one minute ; a small quadrate 

 spot at the lower outer end of the cell, an elongated one at the base of the 

 second median interspace, a much larger quadrate one below it and placed 

 nearer the base of the wing in the first median interspace, all semi-trans- 

 parent diaphanous ochreous. Hindwing with the middle of the disc clothed 

 with long greenish-ochreous hairs. Cilia cinereous throughout. Under- 

 side : forewing also dark brown, the spots as above, the costa narrowly 

 and the apex widely (but not reaching the anal angle or the outer margin) 

 yellow. Hindwing yellow throughout except the outer margin, which is 

 increasingly dark brown, widening to the anal angle; a conspicuous 

 though small black spot on the discoidal cell, three small dark-brown 

 ring-spots placed very close together below it, and a fourth minute black 

 spot well separated from the others towards the apex. No secondary male 

 sexual characters. Head and body above dark brown, below with legs 

 yellow. Antennae black, the club tipped beneath with white. 



Expanse: 1-2 inches. 



Habitat: Sikkim. 



This pretty and very distinct little species is nearest allied to IsoUinon 

 mihi, but is abundantly distinct ; the underside has no purple 



