Subreniform: a rounded spot or outline, below and sometimes attached to the reniform spot in Catocala and some allied Noctuids.
Sub-parallel: nearly parallel.
Sub-primary sub-ventral tubercle: on the thoracic and abdominal segments of caterpillars; sub-ventral, posterior, not present in the primitive first stage; it is VI of the abdomen, V of the thorax: constant.
Sub-sellate: nearly like or approaching the form of a saddle.
Sub-servate: denticulate.
Subspecies: a well-marked form of a species differing from the type in some character of color or maculation which is recognizable but does not prevent a fertile union: an indefinite and opinionative division.
Subspiracular line: in caterpillars, margins the spiracles inferiorly.
Substigmatal: that portion of the marginal cell below the stigma, in bees: = 1st radial 1 (Comst.): applied to a line in caterpillars = subspiracular.
Sub-teres: nearly but not quite cylindrical.
Subtile -is: slightly; feebly; small; pretty; graceful.