''Pycnarmon peruvialis'' is a

moth Moths are a group of insects that includes all members of the order Lepidoptera that are not Butterfly, butterflies. They were previously classified as suborder Heterocera, but the group is Paraphyly, paraphyletic with respect to butterflies (s ...

in the family

Crambidae Crambidae comprises the grass moth family of lepidopterans. They are variable in appearance, with the nominal subfamily Crambinae (grass moths) taking up closely folded postures on grass stems where they are inconspicuous, while other subfamilies ...

. It was described by

George Hampson Sir George Francis Hampson, 10th Baronet (14 January 1860 – 15 October 1936) was an English entomologist. Hampson studied at Charterhouse School and Exeter College, Oxford. He travelled to India to become a tea-planter in the Nilgiri Hills ...

in 1917 and it is found in

Peru Peru, officially the Republic of Peru, is a country in western South America. It is bordered in the north by Ecuador and Colombia, in the east by Brazil, in the southeast by Bolivia, in the south by Chile, and in the south and west by the Pac ...

. The

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

is 22–26 mm. The forewings are silvery white with small black-brown spots on the costa and near the base, the latter followed by three or four minute spots on the costa. There is an antemedial black point in the cell and discoidal striga, the latter with a slight black-brown annulus above it on the costa, as well as a faint brownish-ochreous line from the origin of vein 2 to the inner margin. There is also a brownish-ochreous shade beyond the cell and an ochreous-brown postmedial line with two black-brown striae at the costa. There is a black point at the apex and an elliptical brownish-ochreous patch on the termen, as well as a black striga before the termen at vein 3. The hindwings are silvery white with a black discoidal bar, a postmedial line with a black spot at the costa, which then becomes brownish ochreous. There is also a blackish striga on vein 3 before the termen and a slight ochreous-brown terminal line.

References

Moths described in 1917 Spilomelinae Moths of South America {{Spilomelinae-stub