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Any species of the genus Cicada. They are large hemipterous insects, with nearly transparent wings. The male makes a shrill sound by pecular organs in the under side of the abdomen, consisting of a pair of stretched membranes, acted upon by powerful muscles. A noted American species (C. septendecim) is called the seven…

A genus of hemipterous insects of which the bedbug is the best known example. See Bedbug.

s, for the purpose of solving two celebrated problems of the higher geometry; viz., to trisect a plane angle, and to construct two geometrical means between two given straight lines.

A clique; a sect, society, or body of persons; esp., a body of persons united by some common interest or pursuit; -- sometimes used contemptuously. Partidge and the rest of his clan may hoot me. Smolett. The whole clan of the enlightened among us. Burke.

One of the sections into which a church or congregation is divided, and which is under the supervision of a class leader. Class of a curve (Math.), the kind of a curve as expressed by the number of tangents that can be drawn from any point to the curve. A circle is of the second class. -- Class meeting (Methodist Chur…

A lepidop terous insect with partially transparent wings, of the family Ægeriadæ, of which the currant and peach-tree borers are examples.

Enlarged gradually at the end, as the antennæ of certain insects.

The frontal plate of the head of an insect.

Pressed together; closely connected; -- applied to insects having the abdomen separated from the thorax only by a constriction. Coarctate pupa (Zoöl.), a pupa closely covered by the old larval skin, as in most Diptera.

A genus of hemipterous insects, including scale insects, and the cochineal insect (Coccus cacti).

A dyestuff consisting of the dried bodies of females of the Coccus cacti, an insect native in Mexico, Central America, etc., and found on several species of cactus, esp. Opuntia cochinellifera.

rn Anerica, of the Cactus familly, extensively cultivated for the sake of the cochineal insect, which lives on it.

An orthopterus insect of the genus Blatta, and allied genera.

The case constructed by any insect to contain its larva or pupa.

A short passage connecting two sections, but not forming part of either; a short coda.

An order of insects having the anterior pair of wings (elytra) hard and horny, and serving as coverings for the posterior pair, which are membranous, and folded transversely under the others when not in use. The mouth parts form two pairs of jaws (mandibles and maxillæ) adapted for chewing. Most of the Coleoptera are k…

Of or pertaining to the colleterium of insects. R. Owen.

An organ of female insects, containing a cement to unite the ejected ova.

ent, or the line which passes through the optical center of the object glass and the intersection of the cross wires at its focus.

A suckerlike organ at the base of the abdomen of insects belonging to the Collembola.