Roll out the welcome mat for friendly insects that will get on your garden's good side. While some insects like aphids and grasshoppers can wreak havoc on gardens, not all insects have a destructive bent. In fact, many of these good bugs help eliminate their garden-eating cousins by snacking on them. Insects can also help your garden grow by pollinating flowers. Here are 8 great bugs that will be a pleasure to have around your garden, and suggestions for encouraging them to pay you a visit.