Zygimus[1] is a genus of European capsid bugs in the tribe Mirini, erected by Franz Xaver Fieber in 1870.

It is probably monotypic[2] with records of Zygimus nigriceps (Fallén, 1829) (synonym Phytocois nigriceps Fallén, 1829) from Scandinavia, northern England and Scotland.

[3][4] Z. nigriceps is about 4 mm long and has a black head and pronotum and leaf-green forewings.

It can be distinguished from the similar bug Orthotylus virens by having a brownish membrane with yellow veins.

In Britain, this species is considered rare and confined to northern juniper scrub; adults can be found from June to September.