What is "acusa"

Acusa is a genus of moths of the Erebidae family containing only one species, Acusa acus, which is only known from Sabah on Borneo.

The wingspan is about 13 mm. The forewings are brown, suffused with six black dots on the costa. The medial area is dark brown near the costa. There are indistinct crosslines, except the terminal line, which is marked with black intervenal dots. The fringes are brown. The hindwings are light brown, darkest near base and with an indistinct discal spot. The terminal line is brown and the fringes are light brown. The underside is unicolourous brown and the ventral area of the hindwing is light brown. There is a discal spot on the hindwing.