Table 1 in Review of the Swedish species of Ophion (Hymenoptera: Ichneumonidae: Ophioninae), with the description of 18 new species and an illustrated key to Swedish species

Table 1. Distinguishing characters for females of the Ophion parvulus aggregate.
Posterior transverse carinaCentral flagellomeresApical flagellomeresPilosity of apical flagellomeresTemple in lateral viewDistance between ocelliO. parvulusUsually complete1.5–1.6 times as long as wide1.4–1.5 times as long as wideShort, adpressed0.4–0.5 times as wide as the compound eye0.5 times diameter of ocelliO. paraparvulusUsually widely interrupted centrallyAbout 2.0 times as long as wide1.8–1.9 times as long as wideMedium-long, prominent0.3 times as wide as the compound eye0.3–0.4 times diameter of ocelliO. tenuicornisUsually complete2.5–3.0 times as long as wideAbout 2.5 times as long as wideLong, prominent0.2–0.3 times as wide as the compound eye0.3 times diameter of ocelliO. costatusUsually complete1.5–1.6 times as long as wideAbout 1.5 times as long as wideMedium-long, prominent0.4–0.5 times as wide as the compound eye0.4 times diameter of ocelliO. kallanderiUsually widely interrupted centrally2.0–2.5 times as long as wide1.6–1.7 times as long as wideMedium-long, prominent0.4–0.5 times as wide as the compound eye0.5–0.6 times diameter of ocelli