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If I do not employ a bell-glass or keep an assiduous watch, rarely does the shrewish Dipteron fail to alight upon my patient and explore him with her proboscis.

Each time she passed, the little lizard licked his chops and swallowed—a sort of vicarious expression of faith or desire; or was he in a Christian Science frame of mind, saying, "My, how good that fly tasted!" each time the dipteron passed?

Thorax of a Dipteron to show location of bristles.

He who says Midge says Fly, Dipteron, two-winged insect; and our friend has four wings, one and all adapted for flying.

In her eyes, which see farther than ours, the Eristalis is an odious Dipteron, a lover of corruption, and nothing more.