Seminiferous: semen-secreting. Semipupa: that stage of the larva just preceding pupation: more specifically the interpolated stage between the active larva and the true pupa, in hyper-metamorphosis. Semi-saggitate: like the longitudinal half of an arrow head. Semitropical or Gulf strip: is the southern part of the Austro-riparian area extends from Texas to Southern Florida, covers a narrow strip in So. Georgia and probably follows the coastal lowlands into South Carolina. Sensim: gradually. Sensoria: the circular openings covered by membrane, on the antenna or legs of plant lice. Sensory: relating to or having a sense function. Sensory pittings: deep pits or punctures through the surface, which may or may not bear pegs, bristles or seta, and may be open or covered by a membrane; serving as organs of perception for sounds or smells. Septa, Septula: in Odonata, the triangular area of the mesonotum before the insertion of the primaries: = calli axillary. Septum: an internal division of a body cavity. Sequence: the order in which things follow; e.g. species or genera. Seriatim: placed in longitudinal rows. Sericeous: silky: clothed with very dense minute hair which gives a silky lustre. Sericterium -ies: the silk producing gland or glands in caterpillars: the spinning structures. Series: a group of species, genera or families, arranged to show agreement in a common character which is not of sufficient importance to warrant the next higher division. Serific glands: are these which produce a thick, mucous-like secretion which, on hardening, forms silk. Serosa: the outer membrane that envelops the forming embryo, the amnion and the remainder of the egg. Serpentinous: a dirty, dark green [Hooker's green]. Serra: a saw or saw-like part. Serrate: saw-toothed, the teeth set toward one end. Serrato-dentate: toothed, the edges themselves saw-toothed. Serratulate: with little teeth or serrations. Serricornia: that series of Coleoptera in which the antenna are serrate or saw-toothed. Serriferous: possessing a saw-like ovipositor in the female; the saw-flies. Serrulate: with numerous little saw teeth. Serum: the fluid in which the blood corpuscles float or are suspended. Sesquialter or Sesquiocellus: a large ocellus including a smaller one. Sesquitertial: occupying a fourth part. Sessile: closely seated: the abdomen, when it is closely attached for nearly or quite its full width to the thorax. Sessiliventres: Hymenoptera in which the abdomen is sessile. Seta -ae: a pointed bristle or long stiff hair: slender, hair-like appendages. Setaceous: bristle-shaped: slender, gradually tapering to a tip. Setarious aristate: the dipterous antenna when the arista is simple. Setiferous: = setigercus; q.v. Setiform: in the form of a bristle or seta: when a slender short bristle arises from a thicker basal joint. Setigenous: the hypodermal cells that give rise to setae. Setigerous: bearing setae or bristles; e.g. punctures.