RES Handbook Vol 10 Part 4a i. Diptera - Cyclorrhapha. Calyptrata (1) Section (a) Tachinidae and Calliphoridae (Tachinidae)

THE Calyptrata (Calypterata, Calypterae), containing such groups as dung flies , cabbage flies, house flies, blue bottles, green bottles, warble flies and parasitic flies of caterpillars, etc., are a rather well-defined major group of Diptera, which can be recognised by the cleft on the dorso-exterior surface of the second antennal segment, which in Acalyptrata is visible at the most as a fine suture-like line.