“…I suggest that there could be co-operation with other countries where wasps have invaded, for the introduction of new biological control agents. Rose et al (1999) do not refer to Donovan (1996aDonovan ( , 1996b where I report that in 1991, the year before the old DSIR was dissolved, we imported S. v. burra, and that I had found that there are about a dozen other insects which seem to have good potential for importation to New Zealand. I also discuss a theoretical basis for the introduction of more biocontrol enemies of social insects, which, briefly, is that the presence of each enemy in a wasp nest would disturb the nest in a different way, so allowing other enemies to multiply more rapidly.…”