Scelionid wasps

These wasps are typically black, although they may be yellow or brown. The body shape varies from quite slender to quite robust, and the abdomen is generally flat, with sharply angled side margins.

• I JFK CY( ,F The females of most species lay eggs in the eggs of other insects, especially those belonging to the orders Lepidoptera, I lemiptera, Coleoptera, and Orthoptera. Some species hang on to a host insect until it lays its eggs. To prevent another wasp laying eggs in an egg that they have parasitized, females mark a host's egg with an odor. The hatched scelionid larva feeds on the tissues of the host's eggs and pupates inside.

• OCCl JRRENCK Worldwide. Widespread in many habitats, but especially common in open grassland. Some are specialist parasites of mantids and grasshoppers in semiarid areas and deserts.

• REMARK These wasps are parasitic on some crop pests, and several species have been used in pest-control programs.

Larvae arc pale and grublike, with a flat rear. The head is often withdrawn into the thorax.

flat abdomen

Tremor is pedestre is found in Europe and Asia. Both sexes are wingless. This species has no reason to fly because it parasitizes the eggs of ground-living beetles.

shiny, metallic, dimpled surface antennae can sense vibrations from deep within gall first segment of hind leg larger than on other legs larvae are pale, grublike, and frequently hairy.

smooth, metallic abdomen

long ovipositor

No. of species j ^SO

large pterostigma on farmings yellowish abdomen

meoastkimlis dorsal!s is closely related to species whose larvae develop inside seeds but is itself a parasite of gall-forming insects.

• (inirniKii yellowish legs

0rder Hymknoptkra


No. of species j ^SO

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