SOME BUTTERFLIES FROM THE INDIAN REGION, 757 



Elymnias undularis. Drury. 



A male of this species frora the Namba forest in Assam is strikingly 

 unlike the normal type and shows to what extremes the species may vary. 

 The subterminal blue markings, so prominent in the type form, are here 

 so reduced as to be hardly noticeable ; the usual bright chestnut margin to 

 the hindwing is replaced by a dark brown margin of almost the same tint 

 as in E. cottonis, Hewitson from the Andamans ; and on the underside the 

 purplish white triangular preapical patch and subterminal fascia and 

 the white spots are all absent. The insect looks entirely different though 

 there is no doubt as to its identity. 



Charaxes raidhaka. mihi. 



This new species was described by me in the Records of the Indian 

 Museum, Vol. II, Part III, October 1908, page 285 (see also Jour., Bom. Nat. 

 Hist. Soc, Vol. XIX, No. 1, page 270). It subsequently occurred to me 

 that the new form might be a melanised specimen of C. fabius ; and I have 

 therefore since examined and compared it further with a long series of the 

 latter species. It is always rather dangerous to describe a new species 

 from a single example ; but, though I have not obtained any more speci- 

 mens of raidhaka, my further examinations would seem to confirm my 

 separation of it as a new species. The difference in the outline of the 

 wings, noticed in my original description, has held absolutely good in all my 

 later comparisons ; and I now add the following further slight differences 

 in markings which I have found very constant in fabius. 



Upperside.— The deep black colour has, in some lights, a beautiful indigo 

 blue reflection, somewhat similar to that in E. athamas, Drury. In C. fabius 

 this colouring is sometimes found in fresh specimens over a very limited 

 posterior area of the hindwing. Underside. — There is at the base of inter- 

 space 2 of the forewing a rounded black spot almost filling up the angle 

 between the veins, instead of the very well defined straight transverse line 

 always found in fabius. Finally there is in fabsus, in the precostal cell of the 

 hindwing, a prominent black linear mark, which is entirely absent in the 

 new form. 



Eulepis athamas. Drury. 



The localisation of the two sub-species athamas and agrarius as the 

 Northern and Eastern and South Indian forms, respectively, does not always 

 hold good. I have a typical agrarius from Dehra Dun at the foot of the 

 Himalayas. 



Apatura ambica. Kollar. 



There is another species in which the numbers of the sexes taken are 

 very disproportionate. The male is exceedingly common throughout Sikkim 

 and Assam at low elevations near the hills, but 1 have never yet seen a 

 female there. Curiously enough, the only female I have ever taken was in 

 Mussoorie, where I never saw a male. 

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