Thysanura: fringe-tails; wingless, mandibulate insects without metamorphosis; with anal appendages; body covered with scales; thoracic segments similar.
Tiarate -us: turban or tiara-like.
Tibia -ae: the shank: that part of the leg articulated to the femur basally and which bears the tarsus at the distal end.
Tibial epiphysis: a movable process attached near the base of the inner side of the anterior tibia in many Lepidoptera.
Tibial membrane: in male Cicada, the drum-like vibratory membrane that produces the sound.
Tip: the extremity; the part furthest removed from the base.
Titillator: a small process just below the penis in some Orthoptera.
Tomentose: covered with fine hair, so matted together that particular hairs cannot be separated.
Tomentum: a form of pubescence composed of matted, woolly hair: in Diptera applied to a covering of short, flattened, more or less recumbent, scale-like hair which merges gradually into dust or pollen.
Tongue: an indefinite term, applied usually to the coiled mouth structure of Lepidoptera; the lapping organ of flies; the ligula of bees and wasps and, sometimes also to the hypopharynx of other insects.