Oxycarenus hyalinipennis, common name cotton seed bug, is a species of plant bug belonging to the family Lygaeidae, subfamily Oxycareninae.

[2] While historically it has been documented as an important pest of cotton in the Mediterranean region and in coastal Africa,[3] it is an invasive species whose range has expanded over the last three decades to include islands of the Caribbean region.

Femora are black, while tibiae are brown with a yellow-white band.

It is a polyphagous insect, and it has been documented as a prominent pest upon the following genera within family Malvaceae: Abutilon, Cola, Eriodendron, Gossypium, Malva, Sphaeralcea, Hibiscus, Pavonia, Sida, Dombeya, Sterculia and Triumfetta.

[1][5] Of these, Gossypium appears to be the preferred host,[3][6] but significant pest presence on okra has also been reported.