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.