Dipsomania

(Med.) See ΟΙΝΟΜΑΝΙΑ, Dipso's is, n. [Gr. dip sos.] ( Med.) An intense degree of thirst, superinduced by disease. Dip'tera, Dip'terans, n. pl. [Gr. dipte ros, two-winged.] ( Zool.) Fig. 829. -DIPSAS CYANODON. A sub-order of insects, having for their main and most conspicuous character two wings only corresponding to the anterior pair, and two short clubbed appendages, called halteres , or balancers, and which seem to be the rudiments of the posterior pair in four-winged insects. The Dipterans are also distinguished by having the mouth in the form of a sucker, composed of from two to six lancet-shaped elongated scales, enclosing a canal upon the upper surface of a fleshy tongue or proboscis. The larvæ, or maggots, of the dipterous insects have frequently a membranuos head, and always have the stigmata, or breathing pores, confined to the second and terminal segments of the body. In some species, as the Blow-fly, the eggs are hatched within the body of the parent; in others, as the Forest-fly ( Hippobosca ), the larva undergoes its metamorphosis in the parent's, body, and the young are excluded in the form of pupа . Diptera'ceæ, n . pl . ( Bot . ) An order of plants, alliance Guttiferales. DIAG. Single alternate leaves; large convolute stipules; symmetrical flowers; equilateral petals; an unequal, permanent, winged calyx; beaked anthers; and a one-celled, one-seeded fruit. They are large trees, with single, alternate, involute leaves, and large, deciduous, convolute stipules. The order includes 7 genera, and 47 species, natives of the forests of the East Indies, with the exception of the genus Lophira , which belongs to tropical Africa. - See DIPTEROCARP US, DRYSBALANOPS, VATERIA. Dip'teral, a. [Gr. dis, and pteron, a wing.] ( Zool.) Furnished with two wings only, as the Diptera. ( Arch .) Having a double range of columns all around. A dipteral temple usually has 8 in the front row of the end porticoes, and 15 at the sides, the columns at the angles being included in both.