Setiparous: producing hair or sets. Setireme: the hairy, oar-like legs of aquatic insects. Setose -ous: bristly or set with bristles. Setula: a small stiff bristle or seta: in Diptera, the small thorn at the end of the sub-costa. Setulose: clothed with fine seta or setulae. Sex: as a number, six: the physical difference between male and female: usually indicated by the sign of Mars (?) for male, and Venus (?) for female; workers or undeveloped females have the sign of Venus without the cross line, or a combination of the two others. Sexuparae: that generation of plant lice which produces the true sexes. Shade: a cloudy, ill-defined streak or band. Shagreened: a surface roughened with minute tooth-like projections. Shank: = tibia; q.v. Shard: a chitinous sheath or elytron. Sharp: with a pointed tip or thin edge; opposed to blunt. Sheath of penis: in Odonata, a median, hood-like piece between the hamules, under which the penis is folded when not in use. Shin: = tibia; q.v. Short sector: in Odonata, = media 4 (Comst.). Shoulder: loosely applied to an obtuse angulation; more generally to the humeral angle of fore wings or elytra: the anterior angles of thorax in Lepidoptera; the angles of prothorax in Heteroptera: the lateral angles of metazona of pronotum in Orthoptera. Sialisterium: a salivary gland. Side: the lateral margin of the body. Side piece: in genitalia of male Culicids the main lateral part of the clasping organ or basal segment of clasp. Sides of thorax: in Odonata, includes the pleura of meso- and meta- thorax, less the meso-episterna. Sienna: a brownish orange [brown ochre]. Sigmoid: shaped like the Greek letter sigma, or English S. Signate -us: = with marks or spots; see notate. Signature: a colored blotch of any size or shape. Silaceous: = ochraceous. Silk: the hardened salivary secretion of certain larvae, mainly of Lepidoptera. similar material is produced by anal glands of some larva in Neuroptera. Silk-glands: a pair of modified salivary glands in certain larva, mostly of Lepidoptera that secrete a viscid fluid which, on contact with the air, hardens into a silken fibre. Silvicolous: living in moist, shady woods. Simple, Simplex: without process, armature, or appendage of any kind. Simple eyes: = ocelli; q.v. Sinciput: in Coleoptera; that part of the vertex between the eyes. Sinistrad: toward the left. Sinistral: extending to or at the left from the median line. Sinistro-caudad: extending obliquely from the left toward the tail. Sinistro-cephalad: extending obliquely from the left toward the head. Sinuate: cut into sinuses; applied to lines and margins with an in and out curve. Sinuated: winding: with the edge scooped into sinuses. Sinuato-convex: sinuate and convex. Sinuato-lobate: sinuate and lobed. Sinuato-truncate: truncated, with the margin sinuate. Sinuous: undulating; curved in and out.