Description
This butterfly resembles the Quaker (Neopithecops zalmora), especially in flight. The female Malayan has a broader and more rounded forewing than the male.
Wet-season form — Upperside: from dull somewhat pale brown to dark brown, some specimens nearly uniform, others with a more or less distinct pale discal patch on the fore wing. Hindwing: uniform; a slender short filamentous tail at apex of vein 1,very often absent. Underside: white. Forewing: with the following brown markings:—a spot in cell, a transverse short line on the discocellulars, a postdiscal curved series of transverse spots or very short bars that cross the wing from costa to dorsum and are in irregular echelon one with the other, followed by a slender transverse broken line, a subterminal series of broader transverse spots and an anticiliary slender line; at apex of wing the markings are diffuse and form a very small brown-shaded patch, while further inwards along the costa veins 10, 11 and 12 terminate in a minute brown dot. Hindwing : three spots near base in transverse order, a large, conspicuous, rounded, subcostal and a smaller similar spot near the middle of the dorsum, black; between the latter two and also along the discocellulars are some irregular much paler brown transverse spots on the disc, which are followed as on the fore wing by an outer postdiscal, very slender brown line, a subterminal series of brown or black spots, and a black anticiliary line. Cilia of fore and hind wings white, turning to dark brown at apex of fore wing. Antennae, head, thorax and abdomen dark brown, the antenna ringed narrowly with white; beneath: the palpi, thorax and abdomen snow-white, the third, slender acicular joint of the palpi conspicuously brown.
Dry-season brood.— Very similar to the wet-season brood, but the forewing on the upperside bears a large, oval, obliquely-placed conical patch that extends from the middle of the dorsal margin to vein 4. In certain specimens this white bar or patch is continued on to the hind wing. Underside: similar to that of the wet-season form but all the markings broader, coarser, more prominent. Forewing: costa and apex in some specimens broadly shaded with diffuse fuscous brown; the outer postdiseal brown line formed into a series of lunules that extend outwards slenderly along the veins and join the anticiliary brown line, thus enclosing in the interspaces a series of spots of the white ground colour, each of which is centred with a black or dark brown subtriangular spot. Hindwing: the terminal markings modified as on the fore wing; the spot in interspace 3 of the subterminal series larger and more prominent than the others, the large subcostal black spot often broken by an anterior and a posterior silvery spot superposed on it. Antennae, head, thorax and abdomen as in specimens of the wet-season brood but slightly darker above.
Subspecies include:
- Megisba malaya presbyter - Central and South Nicobars. Rare. Validity requires confirmation.
- Megisba malaya sikkima - Kumaon to Myanmar. Andamans. Not rare. Tailed.
- Megisba malaya thwaites - Sri Lanka, South India to Bengal. Not rare. Tailless.
The tailed and tailless subspecies are sympatric in Sikkim, the tailed one is more commonly found at lower altitudes.
Read more about this topic: Megisba Malaya
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