Nimble Flies

(Family Dexiidae.)
The flies of this group, of which we have nearly fifty species in this country, most of them belonging to the typical genus Dexia, resemble the Tachina flies for the most part, although some are quite handsome, as, for example, Euantha liturata, which has banded wings and a striped thorax. The legs of these flies are usually long and in their early stages they are parasitic in various insects, especially in beetles and also in snails. Some of the exotic species are very handsome, as those of the genus Rutilia.