Hymenoptera sting with a modified egg laying tube called an ovipositor. Male insects do not possess ovipositors and cannot sting. A venom gland or sac is located at the base of the stinger. When the stinger is thrust into the skin a small amount of venom is injected into the victim. The chemical composition of venom varies with each insect species.
Some venoms are more potent that others and human sensitivity varies greatly.