Infericornia: Hemiptera; in which the antenna appear to be inserted well down on the sides of head; e.g. Lygaeidae.
Inferior: beneath, below or behind: a term of position.
Inferior appendage -es: in male Odonata the lower one or two of the terminal abdominal parts used to clasp the female in copulation.
Inferior wings: = hind wings or secondaries: q.v.
Infero-posterior: below and behind: refers to location.
Inflated: blown up; distended bladder-like.
Inflected: bent inward at an angle.
Inflexus: = inflected.
Infra: below or beneath: opposed to supra.
Infra-anal lobe: a thick, conical fleshy lobe, often ending in a chitinous point, situated beneath the vent in caterpillars.