Supra-alar depression: in Diptera = supra-alar groove. Supra-alar groove: in Hymenoptera, a groove or depression just above the base of wings: in Diptera, a groove on the meso-thorax just above the root of the wings. Supra-anal: situated above the anus. Supra-anal hook: in male of most Lepidoptera, a curved hook attached to the plate covering the genital cavity: = uncus. Supra-anal plate: a triangular sclerite covering the anal cavity above; present in many insects, sometimes in one sex only, often in both: see anal operculum. Supra-cerebral: applied to that pair of salivary glands situated above the brain in bees. Supra-clypeal mark: in bees; a patch of light color above the clypeus. Supra-clypeus: = post-clypeus; q.v.: = nasus. Supra-Oesophageal: situated above the oesophagus: applied to two large ovoid ganglia so situated, and connected by a short, thick commissure; - the brain. Supra-orbital: situated above the eye. Supra-spinal: above the spine or nerve cord: applied to a cord or band of connective tissue lying above the central nervous system in adult Lepidoptera also to a sinus or vessel acting as a ventral heart. Supra-spiracular line: in caterpillars, margins the spiracles superiorly. Supra-stigmatal line: = supra-spiracular lines. Supra-triangular cross-veins: in Odonata, cross the supra-triangular space. Supra-triangular space: in Anisoptera, an area just above the triangle, occupying nearly the same position as the quadrilateral of Zygoptera: hyper-trigonal space. Suranal: = supra-anal. Suranal plate: the middle dorsal plate attached to the l0th abdominal segment of the male grasshoppers, above the anal opening: a supra- anal tergite of a caterpillar. Sursum: directed upwardly. Suspensi: the chrysalids of butterflies that are suspended by the tail only: see succincti. Suspensoria: are those muscles or ligaments that hold the viscera and other internal structures in place. Sustentors: the two posterior projections of a butterfly chrysalis. Suture: a seam or impressed line indicating the division of distinct parts of body wall: the line of junction of elytra in Coleoptera. Suturiform: an articulation soldered together so that only a slight impressed line is visible. Swarming: the concerted departure from a hive of a large number of worker bees, accompanied by a queen; this forming the nucleus of a new colony. Swimmerets: gill or plate-like structures in the aquatic larvae of some Neuroptera, serving as oars or organs of locomotion. Swimming paddles: terminal appendages of mosquito pupae. Swoked: smoky, suffused with gray or blackish. Sylvan: species inhabiting forests or woodland areas. Symbiogenesis: the method of origin of social symbiotic relation among ants and other insects.