Racionais brunus is a species of parasitoid wasp in the family Braconidae.

[1] It was described based on a single specimen, a female.

It is overall brown in color and the holotype is 2.7 mm (0.1 in) in body length.

[1] The specific epithet "brunus" is a tribute to Mano Brown, a member of the hip hop group Racionais MC's.

[1] Brunus means brown in Late Latin.