Spinneret: the ligula in bombycid and some other larvae, modified for silk spinning: any organ consisting of an internal tube, terminating in a pore, spine or process, producing a silky or waxy fibre: in the plural, the organs concerned in the emission of the silky or cottony filaments of which the scales or sacs of Coccidae are produced: = fusulus. Spinose -ous -ed: set with acute processes or spines. Spinous-radiate: beset with spines in a circle, either concatenate, united at their bases, or setaceous, like bristles. Spinulae: spinous processes at the apex of the tibia: also called spines, spurs or heels. Spinulate -ose: set with little spines or spinules. Spinules: little spines. Spira: the coiled ovipositor of Cynipidae. Spiracle -cula: a breathing pore: q.v.: in the plural the lateral openings on the segments of the insect body through which air enters the tracheae:= stigmata. Spiracular area: the anterior of the three areas between lateral and pleural carinae on the metanotum of some Hymenoptera: =first pleural area. Spiracular line: in caterpillars is that which includes the spiracles: = stigmatal. Spiracular sulcus: on the metanotum of Hymenoptera, is a grooved linear channel extending from spiracle to apical margin. Spiral: rolled up like a watch spring, or twisted like a cork-screw. {Scanner's comment: Nowadays it is more correct to regard the corkscrew as helical and the watch spring as spiral.} Spiral fibre: the spiral thickening or folding of the chitinous lining of a trachea, which gives to the latter its characteristic microscopic appearance as well as its support and elasticity:= ctenidium. Spirignath: = spiritrompe. Spiritrompe: the spiral tongue in Lepidoptera. Splanchnic: applied to the outer embryonic layer of the rudiment of the mid-intestine: or the inner layer of the mesoderm which, becoming applied to the walls of the alimentary canal, develops into the muscle fibres thereof. Splendens -ent: shining: with a metallic glitter. Splitter: one who splits or describes species or genera upon minute characters which the "Lumper" (q.v.) deems insufficient to authorize them. Spongioplasm: the net-like structure of protoplasm in a cell. Spongiose: a soft, elastic tissue resembling a sponge. Spoon: = bouton; q.v. Spring: in Collembola. = furcula: q.v. Spur: a short, stiff, generally blunt process and usually not articulated at its base: in the plural refers to paired spiniform processes at or near the end of tibia:. Spur formula: a numerical expression of their arrangement; as 2-3-4; two spurs on fore tibia, 3 on middle, and 4 on posterior; in Trichoptera. Spurius: false: applied to aborted anterior legs in some diurnal Lepidoptera. Spurious cell: in Diptera (Pack.), = 3d anal (Comst.). Spurious veins: certain folds or thickenings in the wing surface which resemble a vein so nearly as to be readily mistaken and sufficiently constant to be useful in classification.