Tachina n. : Any one of numerous species of Diptera belonging to Tachina and allied genera. Their larvae are external parasites of other insects.

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Taxonomy
Tothill, Reinhard, Tachina, Genus, Arnaud, 1938, Townsend, 1942, free encyclopedia, family Tachinidae, species, Rowe, Diptera, search, Kingdom, Phylum, Suborder, Subsection.

Defination from the web:
Tachina. Synonyms. Echinomya Duméril, 1804. Echinomyia Latreille, 1809. Larvaevora Meigen, 1800. Tachina is a genus of large flies in the family Tachinidae, most have larvae that are parasitoids of Lepidopteran caterpillars.[1] There are ...