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. Telum: a spear, or spear-shaped process. Temple: the posterior part of the gena; behind, before or beneath the eye. Tempora: the temples. Temporal margins: in Mallophaga, the lateral margins of the hind head. Tenaculum: in Collembola, a small organ which holds the furcula in position when at rest: = catch. Tenant hair: see tenent hair. Tendo: the anal area of secondaries when it forms a groove for the abdomen: has also been called frenum and frenulum: in Trichoptera, a small elliptical space at base of hind wings near base of anal veins and behind the trochlea. Tendon: the slender, chitinous plates, bands, strap- or cup-shaped pieces, to which muscles are attached for moving appendages: see apodeme. Tenent hair: specialized hair adapted for clinging or clasping. Teneral: that state of the imago just after its exclusion from pupa or nymph, in which neither coloring nor clothing is fully developed. Tensor: a muscle which stretches a membrane. Tentacle: a flexible sensory or tactile process; in some cases retractile: usually prefixed by a descriptive term indicating the structure to which it is attached. Tentacular -um: retractile processes on the larvae of Lepidoptera. Tentaculate: a margin when fringed with soft tactile processes. Tentiform: shaped like a tent: see mines. Tentoria: Diptera; two hollow, cylindrical struts which pass from the ventral border of the occipital foramen to the cheeks. Tentorium: a chitinous frame-work within the head, upon which the brain rests. Tenuis: thin, slender; long drawn out. Terebra: a borer or piercer: an ovipositor fitted for boring or cutting as in saw-flies: a mandibular sclerite articulated to the basalis; forms the point of the structure and = the galea of the maxilla. Terebrant: with an ovipositor fitted for piercing or boring. Terebrantia: Hymenoptera with sessile abdomen and valved ovipositors: Thripids in which the ovipositor of female is borer-like.