asotaphaga Cystomastacoides is a genus of parasitoid wasps belonging to the family Braconidae.

It was named by Dutch entomologist Kees van Achterberg in 1997 from a single species Cystomastacoides coxalis discovered in Yunnan, China.

A pair of compound eyes on the head are conspicuously coloured blue or dark-blue.

They belong to the Colastomion Baker, 1917, group of genera which additionally includes the tropical Old World genera Macrostomion Szépligeti, 1900, Megarhogas Szépligeti, 1904, and Myocron van Achterberg, 1991 (van Achterberg 1991).

They have a well-developed tooth on the hind coxa and claws with pointed basal lobes.