Thread subject: Diptera.info :: Which fly?

Posted by Sigrun on 19-07-2012 20:54
#1
This fly, I found yesterday on Cirsium vulgare in my garden in Dortmund West Germany.

Which fly is it? And what are the two "things" at the back?

up.picr.de/11219566jc.jpg

Posted by mossnisse on 20-07-2012 10:20
#2
Terellia (Tephritidae) i think. I don't have a clue what the things in the back is.

Posted by Gnats2meetu on 20-07-2012 10:26
#3
Eversible pleural sacs? These apparently may be for sensory or courtship purposes? http://www.diptera.info/forum/viewthread.php?thread_id=25094&pid=111665#post_111665

Posted by tristram on 20-07-2012 15:24
#4
Looks like a male Terellia serratulae with pheromone sacs everted: http://www.dipter...post_73187

Posted by Sigrun on 20-07-2012 18:09
#5
Thank you very much for the answers!