Jugulum: that sclerite just behind the sub-mentum; =gula: that cavity of the posterior part of the head to which the neck is annexed: the lateral and under parts of the prothorax. Jugum: in certain Lepidoptera and Trichoptera, a lobe or process at the base of primaries, overlapping secondaries and holding the two together in flight. K Katabolic: the destructive change from animal tissue to waste product: see anabolic. Keel: an elevated ridge or carina. Kermesinus: dark red, with much blue [purple lake]. Key: a tabular or other arrangement of species, genera or other classification according to characters that serve to identify them. Kidney-shaped: like a kidney in outline; convex on one long side, concave on the other, the ends evenly and somewhat obtusely rounded: bean-shaped. Knee: the point of junction of femur and tibia. L Labellum -a: the sensitive ridged tip of the mouth structures of certain Diptera: a prolongation of the labium covering the base of rostrum in Coleoptera and Hemiptera. Labial: referring, pertaining or belonging to the labium. Labial segment: the 7th segment of head = second maxillary segment. Labial suture: is between labium and mentum. Labiate: lip-like or having lip-like sutures. Labipalp: a labial palpus. Labis: the slender abdominal forceps in some Lepidoptera. Labium: the lower lip: a compound structure which forms the floor of the mouth in mandibulate insects, behind the first maxilla and opposed to the labium; formed by a fusion in embryonic life of separate right and left maxilla-like halves: in some of its developments referred to as the tongue. Labral suture: is between labrum and clypeus. Labro-frontal lobes: of brain, = trito-cerebrum; q.v. Labrum: the upper lip; covers the base of the mandible and forms the roof of the mouth. Labrum-epipharynx: in the mouth of piercing Diptera is the central unpaired lancet. Lac: a mixture of resin, wax and other substances produced by certain scale insects as a protective covering. Lacer: a lappet; applied to a margin with irregular, broad and deep emarginations, leaving lappet-like intervals. Lacerated: ragged; torn in appearance; see lacer. Lacinia: the inner lobe of first maxilla, articulated to the stipes, bearing brushes of hair or spines: a blade: in Diptera, forms a flat lancet-like piercing structure and is never jointed. Lacinia exteriores and interiores: in Apidae, the palpiger and paraglossa often used for the gales and lacinia of maxilla. Laciniated: jagged; cut into irregular fragments. Lacte: milk-white. Lacteal: relating to milk; milky in appearance. Lactescent: secreting or yielding a milky fluid. Lacteous -eus: white, with a slight bluish tinge, like skim-milk. Lacunae: irregular impressions or cavities: specifically the non-walled cavities of the body. Lacunose: pitted; the surface covered with small cavities. Laemodipodiform: like a laemodipod; similar to the larva of a walking stick. Laete: bright.