Part 153

Trinomial: that method of nomenclature in which a varietal or subspecific name follows the specific term without an intervening mark or indications of its rank.

Tripectinate: when an antenna has three branches or processes to each joint.

Triquetral: = triquetrous.

Triquetrous: with three flat sides.

Tri-regional: divided into three distinct parts or regions.

Trito-cerebral segment: see second antennal segment.

Trito-cerebrum: the posterior portion of the brain, formed by the ganglion of the third primary segment; also termed labro-frontal lobe.

Tri-undulate: with three waves or undulations.

Triungulin: the first larval stage of a meloid beetle.

Trivial: applied to a name, means specific as opposed to generic, or popular as opposed to technical.

Trivittate: with three stripes or vitta.

Trochalopoda: Heteroptera in which the posterior coxae are nearly globose and the articulation is a ball and socket joint: see pagiopoda.

Trochanter: a sclerite, sometimes divided, between the coxa and femur sometimes fused with the femur.

Trochanterellus: see apophysis.

Trochantine: the basal part of the trochanter when it is two-jointed: in Coleoptera, a piece often present on the outer side of and sometimes movable on the coxa; also the small sclerite connecting the coxa with the sternum in Dytiscidae: in Neuroptera and Trichoptera the posterior separated part of the coxa: in Orthoptera, a narrow longitudinal sclerite between mandible and gena.

Trochiformis: cylindro-conic.

Trochlea: the thickened base of the hind wings in Cicada: in Trichoptera a small elliptical space at base of hind wing behind origin of median vein.

Trochlearis: pulley-shaped; like a cylinder contracted medially.

Trochus: that part of an articulated body inserted between the joints.

Trophi: the mouth parts collectively, including the labrum: see buccal appendages.

Trophobiosis: see Symbiosis.

Tropical: is that faunal region which covers the southern part of the peninsula of Florida, the greater part of Central America, the lowlands of southern Mexico south of the table land, and a narrow strip on each side of Mexico which follows the coast northward into the United States.

Tropico-politan: occurring in all tropical regions.

Trumpets: breathing tubes of mosquito pupae.

Truncate: cut off squarely at tip.

Truncature: the truncation or point squarely cut off.

Truncus: the trunk or thorax.

Trunk: the thorax as a whole: the body.