s.

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: