The name, Acanthocephala, is derived from the Greek akanth- meaning "thorn/spine" + kephale meaning "head". This name is in reference to the spine on the front of the head. Terminalis refers to the contrasting terminal (apical) antennal segment.
Apical segment of antenna orange or yellowish, contrasting sharply with the dark segments. Metatibial flange wavy-margined, narrowing distally and extending only two-thirds the length of the tibia. Pronotum covered with golden hairs and with small but distinct tubercles. Abdomen sinuate in outline, the sides of the abdomen bulging outward beyond the wings when viewed from above.
Found in shrubs in woodlands/wood edges; fields and meadows; adults in spring and summer.