Cirsium arvense, Amsterdam-Noord
front and rear spiraculum, lateral
front and rear spiraculum, dorsal
cephalic skeleton, mandibles
mouth field with frontal appendage
The larva is described by de Meijere (1926a, 1934a). The larva has un unusual outline, with ventrally strongly protruding thoracic segments (“double chins”) and a cone-shaped rear end. There is a weakly developed frontal appendage.