Posted by Ben Hamers on 04-08-2018 22:22
#2
Do you remember which thistle they were sitting on ?
According to Smit (2010) host plants of T. hyoscyami are Carduus crispus, C. defloratus, C. acanthoides, C. personata.
The other possibility is Tephritis hendeliana, host plant Carduus nutans.
Ben