''Ianius'' is a monotypic moth genus in the family

Erebidae The Erebidae are a family of moths in the superfamily Noctuoidea. The family is among the largest families of moths by species count and contains a wide variety of well-known macromoth groups. The family includes the underwings ('' Catocala'') ...

described by Richards in 1939. Its only species, ''Ianius mosca'', was first described by

Harrison Gray Dyar Jr. Harrison Gray Dyar Jr. (February 14, 1866 – January 21, 1929) was an American entomologist. Dyar's Law, a pattern of geometric progression in the growth of insect parts, is named after him. He was also noted for eccentric pursuits which includ ...

in 1910. It is found in Mexico and the southern United States, where it has been recorded from Texas. The wingspan is about 30 mm. Adults are on wing from March to May and in September.

References

* Melipotini Moths described in 1910 Monotypic moth genera {{Melipotini-stub