''Pycnarmon leucinodialis'' 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 ...

described by

William Schaus William Schaus (January 11, 1858, in New York City – June 20, 1942) was an American Entomology, entomologist who became known for his major contribution to the knowledge and description of new species of the Neotropical realm, Neotropical Lepido ...

in 1912. It is found in

Costa Rica Costa Rica, officially the Republic of Costa Rica, is a country in Central America. It borders Nicaragua to the north, the Caribbean Sea to the northeast, Panama to the southeast, and the Pacific Ocean to the southwest, as well as Maritime bo ...

. 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 about 21 mm. The wings are semi

hyaline A hyaline substance is one with a glassy appearance. The word is derived from , and . Histopathology Hyaline cartilage is named after its glassy appearance on fresh gross pathology. On light microscopy of H&E stained slides, the extracellula ...

iridescent white, the forewings have a more thickly scaled costal margin. There is a brownish streak on the costa towards base and two short streaks in the cell below it, as well as a white line on the discocellular, edged with pale brown. The outer line is fuscous and broad and the marginal area is shaded with light brown, except on the costa at the apex. The hindwings have a brownish shade on the discocellular, followed by some dark points. There is a subterminal fuscous line, which is more heavily marked on the costa and inner margin. The termen is more heavily scaled and silvery white.''The Annals and Magazine of Natural History: Including Zoology, Botany, and Geology''

References

Moths described in 1912 Spilomelinae Moths of Central America {{Spilomelinae-stub