The larva of nigrella cannot be distinguished from the one of A. mobilis.
Glyceria maxima, Amsterdam
front and rear spiraculum, lateral
rear end and rear spiracula in dorsal view
mandibles, and the spinulose field behind the mandibles
The larva is described by Spencer (1966a). Rear spiraculum with 3 papillae, spiracula wide apart. Mandible with 2 teeth; behind the mandibles a spinulose field.