Boeve, J. L. 1991. Gregariousness, field distribution and defence in the sawfly larvae Croesus varus and C septentrionalis (Hymenoptera, Tenthredinidae). Oecologia (Berlin) 85:440-446.
Boeve, J. L. 1991. Gregariousness, field distribution and defence in the sawfly larvae Croesus varus and C septentrionalis (Hymenoptera, Tenthredinidae). Oecologia (Berlin) 85:440-446.