Taxonomical: systematic: relating to classification.
Testate: covered; concealed: also used as = tectiform.
Tectiform: roof-like, sloping from a median ridge, like the primaries of Cicada.
Tegmen: a covering: sometimes used for the anterior wings in Orthoptera and Neuroptera.
Tegmina: the thickened primaries serving as wing covers in Orthoptera.
Tegulae: small, more or less cup-like scales at the base of primaries in many insects; specifically in Hymenoptera: in Lepidoptera, = the patagia or shoulder tippets; but the homology is disputed; also applied to the lappet-like pieces forming the collar: in Diptera, the alulae, q.v.: the latter use is unfortunate and should be abandoned; the first definition should limit the use of the term: see aileron.
Tegument: a covering surface or skin.
Teleodont: applied to those forms of male Lucanids bearing the largest mandibles: see mesodont, amphiodont, priodont.
Telescopic: arranged so that one portion of an organ or process may be drawn into another, like the joints of a telescope.
Telson: a terminal tubercle bearing the anal opening: the anal segment of the insect embryo.