162 Journal of the F.M.S. Museums. [Vol. X, 



It has been shewn' tlial the subspecies nigriana, 

 chersonesia and natiinensis, recognized by Fruhstorfer, 

 are not separable. Piepers' slates that jauana is referable 

 to mitunensis. I therefore use Fruhstorfer's name cher- 

 sonesia to cover all these forms from the Malay Peninsula, 

 Lingga Archipelago, Banka, Borneo, Natuna Islands, Java 

 and the Kangean Islands (East of Java) . 



It is evidently a variable species, but unfortunately rare 

 in collections. Godfrey's siamensis is remarkable for the 

 absence of a spot immediately below the cell in the fore 

 wing between the first and second median nervules, which 

 is always present in chersones-'a. The double cell-spot in 

 the hind wing of siamensis is very much smaller than that 

 of chersonesia. 



Genus Ideohsis, Ilorsf. 



The only species of this genus found in the Malay 

 Peninsula is common and well-distributed. The general 

 pattern of large black spots and blackened veins on vitreous 

 smoky-white ground-colour makes it easily recognizable, 

 although if it were not for its smaller and stronger wings, 

 it might be taken for a Hestia. 



Ideopsis has been, until recently, regarded as an inter- 

 mediate between Hestia and Danaida. Fruhstorfer, how- 

 ever, compares it to the Hadena-gvowj) of Danaida, and 

 suggests tliat the larva and pupa, when discovered, will 

 resemble those of Radena rather tlian those of Hestia. It 

 is remarkable that the life-history ^1 so common a species 

 should still remam unknown, 



5. Ideopsis daos Boisd. perakana Fruhst. 



hleoiisis daos perakana Fruhstorfer 1910, p. 216, flg. 70a. 

 lieiiitsis daos Distant JS82-8(i. pp. 8 & .07, Tab. I, figs. 3 & 4. 



An examination of some 200 specimens from the F.M.S. 

 Museums, the F.M.S. Agricultural Department and the 

 Rallies Museum, Singapore, shows that this species is widely 

 distributed throughout the Malay Peninsula, ranging from 

 low country to 3,000 ft. and probably higher. 



Probably on the wing all the year round, as specimens 

 in the above collections have been caught in every month 

 of the year except January, February and October 



The species is variable in the size of the wing and in 

 the size of the black spots. Males and females are equally 

 abundant. 



A single female in the F.M.S. Museums froux Tioman 

 Island (oil tlie East (Loasl of Pahang and Johore) differs 

 from the mainland form in the much shorter fore wing 



'MouLTox, 1915, p. 2(H. 

 M'lEi'KKS, 1913, p. 22. 



