
Beneficial insects (sometimes called beneficial bugs) are any of a number of species of insects that perform valued services like pollination and pest control. The concept of beneficial is subjective and only arises in light of desired outcomes from a human perspective. In farming and agriculture, where the goal is to raise selected crops, insects...
Found on
http://en.wikipedia.org/wiki/Beneficial_insects

Insects that are beneficial for crop production because they pollinate plants, attack insect pests or serve other useful purposes.
Found on
http://urbanext.illinois.edu/veggies/glossary.cfm

insects that prey on or parasitize pests.
Found on
http://www.encyclo.co.uk/local/20003
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