Terellia longicauda (Meigen, 1838) * (figs 7, c–g)

Material. Karlovac: Modruš: Feuchtgebiet vor Lug, 02.08.2021, 1 ♂ (Kovac leg.) (SMNF) .

Remarks. Larvae infest flower heads of Cirsium decussatum (= Ci. polonicum) and Ci. eriophorum (Asteraceae) . This species can be easily distinguished from the closely related T. serratulae and its “host races” by its infuscated wings, bluish colour of freshly collected or live flies (greenish in T. serratulae), longer aculeus and phallus; and male lateral surstylus with long marginal setae, but no short setulae.