DIPTERA - CECIDOMYIIDAE, TRYPETIDAE, TACHINIDAE, AGROMYZIIDAE.
DIPTERA
Etymology
: Di-two; ptera-wing
Common names
: True flies, Mosquitoes, Gnats, Midges,
Characters
They are small to medium sized, soft bodied insects.
The body regions are distinct.
Head is often hemispherical and attached to the thorax by a slender neck.
Mouthparts are of sucking type, but may be modified.
All thoracic segments are fused together. The thoracic mass is largely made up of
mesothorax. A small lobe of the mesonotum (scutellum) overhangs the base of the
abdomen.
They have a single pair of wings.
Forewings are larger, membranous and used for flight.
Hindwings are highly reduced, knobbed at the end and are called
halteres
. They are
rapidly vibrated during flight. They function as organs of equilibrium.Flies are the swiftest
among all insects.
Metamorphosis is complete. Larvae of more common forms are known as maggots. They
are
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