Claim: Western conifer seed bugs is 16–20 millimetres (0.63–0.79 in) long and are somewhat similar in appearance to a caterpillar.
Evidence: The average length is 16–20 millimetres (0.63–0.79 in) with males being smaller than females. Western conifer seed bugs are somewhat similar in appearance to the wheel bug (Arilus cristatus) and other Reduviidae (assassin bugs).