It is not alone the parasitic and predaceous insects which are beneficial.
Predaceous: applied to insects that live by preying upon other organisms.
They all are predaceous, powerful creatures, with a partiality for eggs.
Have live water-tigers and predaceous water-beetles in the aquarium.
Another group, the predaceous wasps, should be mentioned here.
They are predaceous; feeding on insects and other small forms.
Man, then, by the position of his eyes belongs to the predaceous animals.
The larvae in this family are well-armoured, active and predaceous.
The beetles are hairy and their larvae well-armoured and often predaceous.
The most destructive are the predaceous and parasitic insects.