Brassica rapa, Amsterdam
front spiraculum in doral and lateral view
Pisum sativum, Castricum; cephalic skeleton and rear end (dorsal view)
rear spiracula dorsal; one spiraculum in lateral view (two of the three elliptic papillae are visible)
mandible and mouth field
Larva slender with a characteristic rear end. Rear spircula light in colour (those of Sc. graminum are brown) and more acutely pointed (Máca, 1972a); see also Hendel !928a).
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