IN autumn the grass-feeding larvæ of Tenthredopsis litterata Geoff. and T. nassata F. undergo an ecdysis prior to entering the soil at plant roots, where they remain as overwintering non-feeding ...

Parasitoid wasps, belonging to the family Hymenoptera, deprive their insect ... discs—adult tissue precursors—in the host fly larvae. By degrading these tissues, the IDDF-containing venoms ...