Part 152

Translucid: clear: transparent enough to be seen through.

Transparent: so clear as not to obstruct vision.

Transverse: when the longest diameter is across the body.

Transverse incision: = transverse sulci.

Transverse sulci: the transverse grooves of pronotum in many Orthoptera.

Transverse suture: in Diptera, a transverse groove extending inward from the root of wing and obsolete in the middle of dorsum.

Trapeziform: in the form or shape of a trapezium.

Trapezium: a four-sided figure in which no two sides are parallel. {Scanner's comment: sic This is presumably an error in editing the original text. A trapezium has two sides parallel. Compare next item.}

Trapezoid -al: a four-sided plane of which two sides are parallel and two are not.

Tri-: three; a combining form.

Triangle: in Odonata: a small, triangular cell at the junction of cubitus with cubitus 1: a similar cell adjoining it basally is the internal triangle discoidal triangle: cardinal cell; q.v.

Tri-articulate: composed of three joints or articles.

Tribe: a term of classification less than a sub-family: opinionative and ending in ini: but this is not universally adhered to.

Tri-carinate: with three keels or carinae.

Trichogen: a hair-forming hypodermal cell in caterpillars, etc.

Trichoptera: hairy-winged: insects with hairy primaries with many longitudinal veins and cells, covering the broader secondaries which are usually folded lengthwise; mouth mandibulate but rudimentary: head free; thorax agglutinate: metamorphosis complete.

Trichostical bristles: in Diptera, a fan-like row, situated on the meta-pleura: conspicuous in some families.

Trichotomous: divided by threes.

Trichroism: the condition when any given part exhibits three different colors in different individuals of the same species: e.g. in Lepidoptera, the hind wings of certain Heliconids.

Tricuspidate: ending in three points: with three cusps or teeth.

Tridactyle -ous: having three toes or claws.

Trifid: cleft into three parts or ends.

Trigonal: triangular: an area bounded by a triangle.

Trigonate: three-cornered; approximately triangular.

Trigoneutism: where three broods occur in one season.

Trigonulum: in Odonata, = triangle.

Trimera: that series of Coleoptera, in which there are only three tarsal joints present.

Trimerous: species which have the tarsi three-jointed.