Hymenoptera larvae have two main forms, caterpillar-like and grub-like. The larvae of social Hymenoptera such as bees, ants and some wasps are grub-like. They can be identified by recognizing the nest you collect them from. Sawflies are usually caterpillar-like except they have more than four pairs of fleshy legs and the legs do not have crochets. They often feed in groups on pines, dogwood and other tree leaves. Distinguishing different sawflies is difficult. There are also many other larval forms of Hymenoptera especially among the parasitic types.