Stirps: a stock or stem: a division of classification similar to super-family: not used at present.
Stoma -ata: a breathing pore or pores:= stigma; q.v.
Stomach: that portion of the alimentary canal, immediately following the gizzard and preceding the ileum, into which most of the digestive juices are poured = chylific ventricle.
Stomatodaeum: that invagination of the ectoderm that forms the mouth, pharynx, oesophagus, crop and gizzard.
Stomatogastric: that system of nerves and ganglia, lying along the dorsal and lateral surfaces of gullet and crop.
Stomatotheca: that part of the pupa covering the mouth structures.
Stramineous -eus: straw yellow [pale clay yellow].
Strangulate: constricted, as if by bands or cords.
Stratified: arranged or made up in layers.
Strepsiptera: twisted-wing: an ordinal term proposed for the parasitic Stylopidae, now ranged as a family of Coleoptera = Rhipiptera.