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. Tooth: an acute angulation: a short pointed process from an appendage or margin. Topomorph -ic: a geographic form, variety or subspecies of a widely distributed species: developed by local environment. Topotype: is a specimen collected in the exact locality whence the original type was obtained. Tornal: relating to or concerning the tornus. Tornus: in Lepidoptera, the junction of the termen and dorsum of wing: = hind or anal angle; q.v. Torose: swelling into knots or protuberances. Torpid: lying motionless by reason of cold or other natural conditions that unfavorably affect the organism. Torqueate: with a ring or collar. Torquillus: = rotula. Tortilis: twisted. Tortulose-us: hump-backed; a surface with a few large elevations: beaded; moniliform. Tortuose -us: irregularly curved and bent; snake-like. Tortuous: = Tortuose. Torulus: the basal socket joint of the antenna upon which the organ is articulated for movement in all directions. Totidem: in all parts; entirely. T.P. line: transverse posterior line; crossing the primaries of certain Lepidoptera, two-thirds or more from base: = post medial line. Trabecula: rounded, lobular masses of the procerebrum, from which arise the stalks bearing the mushroom bodies: a paired movable appendage in front of the antennae in certain bird-lice. Trachea -ae: the spirally ringed breathing tube or tubes of insects. Tracheal gills: the flattened or hair-like processes in aquatic larvae through which oxygen is absorbed from the water. Tracheary: relating to or composed of tracheae. Tracheate: supplied with trachea: a general term applied to all articulates that breathe by means of spiracular openings into a system of tubular structures that extend to all parts of the body. Tracheation: the arrangement or system of distribution of trachea. Tracheoles: the capillary trachea of the adult as they develop in masses in the larva: very small, slender tracheae. Transection: a cut across, at right angles to the body: transverse section. Transition zone: is the transcontinental belt in which the austral and boreal elements overlap: it is divided into a humid or Alleghanian area; a western arid area; and a Pacific Coast humid area: all of which see. Transitory: lasting for a short time only. Translucent: semi-transparent; admitting the passage of light but not of vision. Translucid: clear: transparent enough to be seen through. Transparent: so clear as not to obstruct vision.