Tropidothorax leucopterus is a species of ground bugs belonging to the family Lygaeidae, subfamily Lygaeinae.

Bodies of these bugs are oval-elongated, with a striking red-black warning color.

Pronotum has a middle keel running from the front edge to the posterior margin.

The membrane is matt black, with a white spot at the inner angle.

In Europe these bugs are present in Albania, Austria, Belgium, Bosnia and Herzegovina, Bulgaria, Croatia, Czech Republic, France, Germany, Greece, Hungary, Italy, Lithuania, Moldova, Russia, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Switzerland and Yugoslavia),[1] These bugs mainly feed on white swallow-wort (Vincetoxicum hirundinaria) and broadleaf milkweed (Asclepias syriaca).