The Sawfly (Tenthredo bifasciata) is a distinct subspecies of common sawfly belonging to the family Tenthredinidae within the suborder Symphyta. Unlike members of the suborder Apocrita (ants, bees, and true wasps), symphytans are morphologically characterised by a broad junction between the thorax and abdomen, lacking the constriction known as a petiole ("wasp waist").