Anthyllis vulneraria, Amsterdam Zuid, leg Patrick Meirmans; cephalic skeleton
The larva is slender; the rear end has a characteristic shape. The rear spiracula are brown (those of S. flava are light coloured) (Máca, 1972a). See also Okada (1968a) for a detailed description of the larva.
According to Máca (1972a) there also is a difference between S. flava and graminum in the shape of the rear spiraculum, as appears in this illustration, derived from this publication