Search the Dictionary

An internal dorsal chitinous process between the first two divisions of the thorax of insects.

The segment which forms the posterior part of the thorax of a hymenopterous insect. [Written also propodeum.]

The ventral plate of the prothorax of an insect.

The first or anterior segment of the thorax in insects. See Illusts. of Butterfly and Coleoptera.

One of the soft gelatinous cones found in the compound eyes of certain insects, taking the place of the crystalline cones of others.

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

division of insects (Zoöl.) reticulated wings, as in the Neuroptera, but having an active pupa state. It includes the dragon flies, May flies, white ants, etc. By some zoölogists they are classed with the Orthoptera; by others, with the Neuroptera.

A stage intermediate between the larva and pupa of bees and certain other hymenopterous insects.

An egglike germ produced by the agamic females of some insects and other animals, and by the larvæ of certain insects. It is capable of development without fertilization. See Illust. of Pædogenesis.

A thickened opaque spot on the wings of certain insects.

A covering of soft short hairs, or down, as one some plants and insects; also, the state of being so covered.

Covered with pubescence, or fine short hairs, as certain insects, and the leaves of some plants.

A genus of parasitic insects including the fleas. See Flea.

One of the minute cushions on the feet of certain insects.

ed or shrunken; -- said especially of grain which has lost its juices from the ravages of insects, such as the wheat midge, or Trips (Thrips cerealium).

Any insect in that stage of its metamorphosis which usually immediately precedes the adult, or imago, stage.

parasitic Hymenoptera, including the ichneumon flies, which destroy the larvæ and pupæ of insects.

Feeding on the pupæ of insects.

The caudal plate of trilobites, crustacean, and certain insects. See Illust. of Limulus and Trilobite.

Having four wings; -- said of insects.