Butterflies of the Indian subcontinent
Straight-banded Treebrown
Lethe verma  KOLLAR, 1844
subfamily - SATYRINAE
subtribe - LETHINA
Lethe verma  West Sikkim, India Adrian Hoskins
The genus Lethe is composed of 112 species, most of which are found in temperate forests in Asia, although there is one species endemic to Sulawesi, another endemic to Java. Several of the species are very localised, being confined to the forests of particular mountains, but others are widespread. The commonest and most widely distributed species is rohria, which is found from Afghanistan to China, and south to Java, Bali and Lombok.
Lethe species typically have sombre earthy brown uppersides, although a few such as confusa have prominent white diagonal bands on their forewings; while others such as sinorix have a series of dark ocelli on the hindwings, set within a band of suffused orange. The undersides are usually more strongly marked than the upper surface, and the hindwings feature a series of 7 prominent ocelli, of which the first ( uppermost ) and fifth are usually the largest. The rounded hindwings of verma are unusual for this genus - most Lethe species have angular hindwings.
Lethe verma occurs in north-east India, Myanmar, Thailand, Laos, Cambodia, Vietnam, China and peninsular Malaysia.
Lethe verma, Hee Bermiok, West Sikkim, India Adrian Hoskins
This species flies in forest glades at elevations between about 300-1800m.
The larval foodplant is probably bamboo ( Poaceae ).
Adult behaviour

Most Lethe species are encountered in two's or three's however verma is often found in much larger numbers, with as many as 50 flying in the dappled sunlight of a small forest flade or along a semi-shaded trail. Males often settle in a head-downward posture on tree trunks, using these as outlooks from which to survey and intercept passing females.

Lethe verma, Hee Bermiok, West Sikkim, India Adrian Hoskins



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