Subcostal fold or furrow: lies between costa and radius.
Subcostal nervule: Lepidoptera, on secondaries:= media 1 (Comst.): s.c. 1 = radius 1 (Comst.); s.c. 2:= radius 2 (Comst.) s.c. 3 = radius 3 (Comst) s.c. 4 = radius 4 (Comst.) s.c. 5 = radius 5 (Comst.).
Subcostal vein: in Diptera (Schiner), = 1st longitudinal vein (Meigen) radius 1 (Comst.): in Lepidoptera, runs from base, parallel to costa, to or beyond the middle, giving rise to branches which extend to the outer margin and thus = radius (Comst.).
Sub-cristate: with a moderately elevated ridge or keel on pronotum, in Orthoptera.
Subcutaneous: under the skin: applied to larvae that feed under the skin of animals or within the substance of a leaf.
Sub-dorsal: the space between the dorsum and the stigmata.
Sub-dorsal line: in caterpillars is to the side of the dorsal and between it and the lateral or, if there is an addorsal line, between that and the lateral.
Sub-dorsal ridge: in slug caterpillars, extends longitudinally along the sub-dorsal row of abdominal tubercles.
Sub-equal: similar, but not quite equal in size, form or other characters.
Sub-eroded: wing margins when somewhat, but irregularly, indented.