Largus californicus, also known as the California bordered plant bug, is a species of bordered plant bug in the family Largidae.

[1][2][3] They measure around 2.5 cm (0.98 in) in length.

Adults have a black exoskeleton with orange edges on the thorax and abdomen.

Nymphs are metallic blue, later with a red spot at the base of the abdomen.

[4][5] They are indistinguishable in appearance from Largus cinctus.