Basal-most portion of the forewing
vein complex that occurs behind the costal cell
; measured from the constriction that delimits the humeral plate
to the point at which the vein touches the leading edge
of the wing
written by: Gibson , G. A. P., J. D. Read , and R. Fairchild. 1998. Chalcid wasps (Chalcidoidea): illustrated glossary of positional and morphological terms ..