Issus coleoptratus is a common insect found in the western Palaearctic. It is a species of planthopper that is 5.5–7.0 millimetres (0.22–0.28 in) long. The coloration of this insect can vary from light brown and olive to nearly black. There is only one generation per year. It is unable to fly, unlike most members of its family. It feeds on the phloem of different trees, such as lime trees, oaks, maples, birches, elms and hazels.