Proper identification of pests and beneficial organisms found on landscape plants is vital if sound pest management is to be practiced. This paper presents techniques and information useful in the identification of some of the more commonly encountered insect larvae found on the leaves and bark of trees and shrubs. It is by no means an exhaustive summary but is intended to aid in the recognition of broad groups of insects including the larvae of moths and butterflies, sawflies, leaf beetles, lacewings, flies, and lady beetles. Through proper identification of larvae, practices that reduce the activities of or kill beneficial organisms can be avoided.