Diptera.info :: Identification queries :: Diptera (adults)
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 Another one of the notorious Phaonias (?)
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| Juergen Peters |
Posted on 01-12-2006 21:55
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 Member Location: northwest Germany Posts: 13918 Joined: 11.09.04 |
Hello! Still many flies on tree trunks today (and the blackberries are blooming, attracting the still active Episyrphus balteatus). Is this one Phaonia rufiventris? Thanks in advance! [Edit] I forgot: found today in Ostwestfalen/Germany.    
Edited by Juergen Peters on 01-12-2006 22:00 Best regards, Jürgen -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= Juergen Peters Borgholzhausen, Germany WWW: http://insektenfo... -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= |
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| Tony Irwin |
Posted on 02-12-2006 10:15
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 Member Location: Norwich, England Posts: 7234 Joined: 19.11.04 |
Hi J?rgen I think you have two species here. My guess (I can't be sure) is that the top two are Phaonia subventa. The bottom two may be Phaonia bitincta, but without specimens to hand, it's tricky - and let's not forget the possibility of Mydaea maculiventris.  As Robert has suggested before, this is a difficult group, and we need to keep taking good photos of collected specimens. I will try this winter to sort out some other characters which can be used to separate them.
Tony ---------- Tony Irwin |
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| Juergen Peters |
Posted on 02-12-2006 20:03
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Member Location: northwest Germany Posts: 13918 Joined: 11.09.04 |
Hello, Tony! Tony Irwin wrote: I think you have two species here. Thanks, but that would have been very tricky - because all photos show the same individual... 
Best regards, Jürgen -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= Juergen Peters Borgholzhausen, Germany WWW: http://insektenfo... -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= |
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| Tony Irwin |
Posted on 02-12-2006 20:47
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Member Location: Norwich, England Posts: 7234 Joined: 19.11.04 |
I don't think so. The top fly has broadly darkened base of scutellum and the post-alar callli are grey. Also the presutural dark stripes are two-thirds the width of the pale stripe separating them, and the abdomen has a dark central line. The lower fly has an almost entirely yellow scutellum and the post-alar calli are yellow. The central presutural dark stripes are only a third of the width of the pale stripe separating them, and the abdomen is entirely yellow. And it's lost its right mid tarsus. I think the flies are so keen to get in your photos that they are pushing each other out of the way! 
Tony ---------- Tony Irwin |
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| crex |
Posted on 02-12-2006 20:47
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 Member Location: Sweden Posts: 1996 Joined: 22.05.06 |
Juergen Peters wrote: Hello, Tony! Tony Irwin wrote: I think you have two species here. Thanks, but that would have been very tricky - because all photos show the same individual... The scutellum and (dorsal part of) abdomen is darker on the first two photos!? |
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| Juergen Peters |
Posted on 03-12-2006 04:08
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Member Location: northwest Germany Posts: 13918 Joined: 11.09.04 |
Hello, Tony! Tony Irwin wrote: I don't think so. The top fly has broadly darkened base of scutellum and the post-alar callli are grey. Also the presutural dark stripes are two-thirds the width of the pale stripe separating them, and the abdomen has a dark central line. Then the two have fooled me... ;-). I remember, that the fly flew away and came back immediately to almost the same point. But that must have been another fly... Very tricky those Muscidae...
Edited by Juergen Peters on 03-12-2006 04:09 Best regards, Jürgen -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= Juergen Peters Borgholzhausen, Germany WWW: http://insektenfo... -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= |
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