Thread subject: :: Unknown Fruit Fly(s?) on Thistle

Posted by John Smit on 07-12-2005 09:59

I 've got the feeling they're both the same species.
I am not that familiar with the Nearctic fauna, but this looks like Terellia, in order to be sure I'll need a picture from above, for the wingvenation is needed for separation of the genera. There are two indigenous species: T.occidentalis and T. palposa. It is not one of the introduced Palearctic species: T. fuscicornis, T. ruficauda & T. virens.
I don't know what the difference between the two species is. But I can look into it.