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An extensive order of insects having only two functional wings and two balancers, as the house fly, mosquito, etc. They have a suctorial proboscis, often including two pairs of sharp organs (mandibles and maxillæ) with which they pierce the skin of animals. They undergo a complete metamorphosis, their larvæ (called mag…

Having two wings only; belonging to the order Diptera.

An insect of the order Diptera.

Falsely or imperfectly dipteral, as a temple with the inner range of columns surrounding the cella omitted, so that the space between the cella wall and the columns is very great, being equal to two intercolumns and one column. -- n.

In Diptera, the rudimentary posterior wing.

iction. Coarctate pupa (Zoöl.), a pupa closely covered by the old larval skin, as in most Diptera.

Having two wings, as certain insects; belonging to the order Diptera.

Any dipterous insect; as, the house fly; flesh fly; black fly. See Diptera, and Illust. in Append.

plant by insects or their larvae. They are most commonly caused by small Hymenoptera and Diptera which puncture the bark and lay their eggs in the wounds. The larvae live within the galls. Some galls are due to aphids, mites, etc. See Gallnut.

Balancers; the rudimentary hind wings of Diptera.

The sucking proboscis of various insects. See Lepidoptera, and Diptera.

ects, crustaceaus, and related animals, whether adapted for biting or not. See Illust. of Diptera.

An unsect which feeds on mucus, or the sap of plants, as certain Diptera, of the tribe Mucivora.

s of certain insects (Stylops). They resemble the halteres, or rudimentary hind wings, of Diptera.

or Obtected, pupa, a pupa which is incased in the dried-up skin of the larva, as in many Diptera. -- Masked pupa, a pupa whose limbs are bound down and partly concealed by a chitinous covering, as in Lepidoptera.

A division of Diptera in which the young are born in a stage like the pupa. It includes the sheep tick, horse tick, and other parasites. Called also Homaloptera.

Bearing, or containing, a pupa; -- said of the matured larvæ, or larval skins, of certain Diptera.

A genus of Diptera, including the flesh flies.

-- Sheep tick (Zoöl.), a wingless parasitic insect (Melophagus ovinus) belonging to the Diptera. It fixes its proboscis in the skin of the sheep and sucks the blood, leaving a swelling. Called also sheep pest, and sheep louse. -- Sheep walk, a pasture for sheep; a sheep run. -- Wild sheep. (Zoöl.) See Argali, Moufl…

Any one of numerous species of Diptera belonging to Tachina and allied genera. Their larvæ are external parasites of other insects.