[5] Their wings are dark in color and possess many longitudinal veins, which distinguish them from the morphologically similar family, Lygaeidae.

The plectrum consists of nodes found on the legs which are a project of bone or stiff tissue which are along and across the femur.

The sound which is produced is theorized to be of low intensity due to the small size of the plectrum's nodes and to be an assortment of notes rather than one.

[9][6] Unlike ants and wasps, Alydus eurinus has mouthparts typical of the Hemipteran, in which the mandibles and maxillae have been modified to form a stomatostyle.

The defensive chemical mix of butyric and hexanoic acids is released from their metathoracic scent glands.