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Megarhyssa macrurus, also known as the long-tailed giant ichneumonid wasp [1] or long-tailed giant ichneumon wasp, [2] is a species of large ichneumon wasp. [3] It is a parasitoid, notable for its extremely long ovipositor which it uses to deposit an egg into a tunnel in dead wood bored by its host, the larva of a similarly large species of horntail.
Megarhyssa, also known as giant ichneumonid wasps, giant ichneumons, or stump stabbers, [1] is a genus of large ichneumon wasps, with some species known for having the longest ovipositors of any insects. They are idiobiont endoparasitoids of the larvae of wood-boring horntail wasps. The ovipositor can be mistaken for a large stinger. [2]
The wasps, bees, and ants together make up the suborder (and clade) Apocrita, characterized by a constriction between the first and second abdominal segments called a wasp-waist , also involving the fusion of the first abdominal segment to the thorax. Also, the larvae of all Apocrita lack legs, prolegs, or ocelli.
The species Pimpla rufipes has several synonyms, which include Pimpla hypochondriaca and Pimpla instigator. Pimpla instigator (Fabricius, 1793) has been permanently rejected under the International code of Zoological Nomenclature, since the original name Ichneumon instigator Fabricius, 1793 is a junior homonym of Ichneumon instigator Rossius, 1790, which represents a pimpline species outside ...
Stings containing venom are more likely to be painful. Less frequently, venomous spider bites are also associated with morbidity and mortality in humans. Most arthropod stings involve Hymenoptera (ants, wasps, and bees). While the majority of Hymenoptera stings are locally painful, their associated venom rarely cause toxic reactions unless ...
The length of adults varies from about 10–20 millimetres (0.39–0.79 in) in males up to 20–40 millimetres (0.79–1.57 in) in the females, plus about 20–40 millimetres (0.79–1.57 in) of the ovipositor. These ichneumon wasps have a thin black body, several whitish spots on the head, thorax, and abdomen and reddish legs.
Wasp stinger, with droplet of venom. A stinger (or sting) is a sharp organ found in various animals (typically insects and other arthropods) capable of injecting venom, usually by piercing the epidermis of another animal. An insect sting is complicated by its introduction of venom, although not all stings are venomous
Pepsis grossa, alongside a golden paper wasp for scale. Due in part to confusion over the distinctness of various color forms, until 2002 this species was known by the name Pepsis formosa, including a subspecies P. formosa pattoni, but C.R. Vardy synonymized both forms of P. formosa into P. grossa.