Eurytomid wasps

These wasps are yellow, reddish, or dull black. A few have a metallic sheen. They look similar to chalcid wasps (see p. 196), but the hind coxae arc never very enlarged and the femora do not have projections.

• LIKE CYCLE Many of these wasps lay eggs inside seeds, where their larvae develop. Some are leaf-miners or gall-formcrs. Others develop as parasitoids inside beetle, wasp, or fly larvae, and the smaller species attack the eggs of grasshoppers or certain bugs. A few species have a mixed feeding strategy, parasitizing gall-forming insects initially and then, as the larvae grow bigger, eating the gall tissue.

• occl jrkence Worldwide. In a variety of habitats.

sycoi'h/ia hkuj'itata develops inside galls made by gall wasps on oak trees. The larvae of this species are parasitic on the gall-former.

I ,ARVAI<: are tiny, white, and grublike. Some have quite long hairs.

Larval feeding habits

0rder Hymknoptkra

Family GASTKRUPTIIDAK

No. of species cjqq

rectangular pronotum dark patch on • forewittgs pointed abdomen in females

dimpled thorax ovipositor placed inside gall tissue to reach gall wasp larvae dimpled thorax ovipositor placed inside gall tissue to reach gall wasp larvae

EllRYTOMA

HRUNNIVKNTR1S is linked with certain gall-forming wasps. Its larvae may parasitize the wasps or other insects inside the gall. They may also eat gall tissue.

few veins on very long, slender ovipositor

Larval feeding habits ^

slender abdomen g xsterl ptioh SPE< n s are often seen feeding at flowers in the sunshine.

swollen hind tibiae

Larval feeding habits ^

Gasteruptiid wasps

These slender, dark-colored wasps look very much like ichneumons (sec opposite), but the head is borne on a short neck, and the slim abdomen joins the thorax well above the hind coxae. The hindlegs arc long, and the hind tibia are swollen at their ends. The ovipositor can be very long.

• Like Cycle After mating, females seek out the nests of solitary bees or wasps in sandy soil or inside plant stems or wood. Eggs are laid in the nest, and the larvae eat the eggs and the food store left for the host bee larvae.

• occurrence Worldwide, especially in warmer areas. In various habitats, wherever hosts are found.

• KEMARk (iasteruptiids have a distinctive hovering flight, with their hindlegs dangling below the body.

''^TP'Tv ' akva,<: can ')c quite ^^jUJ-ujA hairy, and the mandibles ^ have three teeth.

slender abdomen g xsterl ptioh SPE< n s are often seen feeding at flowers in the sunshine.

few veins on very long, slender ovipositor swollen hind tibiae black and whitish yellow marks on abdomen

reddish legs

AR/IYSSA EERSUASOR/A is a large ichneumon wasp that parasitizes the larvae of horntail wasps (see p.205) as they feed inside timber.

swollen antenna! segment brown tips to fore- and

J OP PA ANTE NNATA is characterized by its swollen antcnnal segments and contrasting, wasplike coloration.

orange marking on front of hind black markings on edge o f forewings long ovipositor for drilling timber or penetrating burrows

Larvae are pale and maggotlike. Some have a tail that shortens with age.

yellow wing patterns

PARACOU.YRIA SPKCIKS are native to Africa. Their bright, wasplike coloring is a warning to predators and is mimicked bv other insects.

0rder Hymknoptkra

Family IcuNKUMONIDAK

AR/IYSSA EERSUASOR/A is a large ichneumon wasp that parasitizes the larvae of horntail wasps (see p.205) as they feed inside timber.

swollen antenna! segment yellow wing patterns brown tips to fore- and

PARACOU.YRIA SPKCIKS are native to Africa. Their bright, wasplike coloring is a warning to predators and is mimicked bv other insects.

black markings on edge o f forewings

J OP PA ANTE NNATA is characterized by its swollen antcnnal segments and contrasting, wasplike coloration.

orange marking on front of hind

0 0

Post a comment