''Imma chasmatica'' is a

moth Moths are a paraphyletic group of insects that includes all members of the order Lepidoptera that are not butterflies, with moths making up the vast majority of the order. There are thought to be approximately 160,000 species of moth, many of w ...

in the family

Immidae Immoidea is a superfamily of pantropical moths containing only the family Immidae comprising ten genera with around 250 species, over half of them in the genus ''Imma''. Many are brightly coloured and diurnal. The position of this group is curr ...

. It was described by

Edward Meyrick Edward Meyrick (25 November 1854, in Ramsbury – 31 March 1938, at Thornhanger, Marlborough) was an English schoolmaster and amateur entomologist. He was an expert on microlepidoptera and some consider him one of the founders of modern micr ...

in 1906. It is found in the Indian states of

Sikkim Sikkim (; ) is a state in Northeastern India. It borders the Tibet Autonomous Region of China in the north and northeast, Bhutan in the east, Province No. 1 of Nepal in the west and West Bengal in the south. Sikkim is also close to the Siligur ...

and

Assam Assam (; ) is a state in northeastern India, south of the eastern Himalayas along the Brahmaputra and Barak River valleys. Assam covers an area of . The state is bordered by Bhutan and Arunachal Pradesh to the north; Nagaland and Manipur ...

. The

wingspan The wingspan (or just span) of a bird or an airplane is the distance from one wingtip to the other wingtip. For example, the Boeing 777–200 has a wingspan of , and a wandering albatross (''Diomedea exulans'') caught in 1965 had a wingspan of ...

is 31–33 mm. The forewings are fuscous finely sprinkled with

blackish ''Black-ish'' (stylized as black·''ish'', `black·''ish'', and black''ish'') is an American sitcom television series created by Kenya Barris. It aired on ABC from September 24, 2014, to April 19, 2022, running for eight seasons. ''Black-ish'' ...

, with some obscure pale strigulae, especially on the costa anteriorly. There is a blackish streak beneath the costa from near the base to near the middle, interrupted by pale strigulae and there is an undefined blackish line along the submedian fold almost throughout. An undefined irregular blackish streak is found in the disc from one-third to the termen, posteriorly split into three more or less marked branches on the veins, interrupted by a suffused whitish-ochreous dot at three-fifths. The veins towards the costa before the apex and towards the tornus are more or less marked with blackish and there is a small apical spot of pale ochreous suffusion. The hindwings are dark grey.''Transactions of the Entomological Society of London''. 1906 (2): 199.

References

Moths described in 1906 Immidae Moths of Asia {{Immidae-stub