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The Society for the study of flies (Diptera)

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#1 2015-06-03 00:24:41

Jim Jobe
DF Members
Name: Jim Jobe
Registered: 2008-04-08
Posts: 140

Calypterate ID please.

Can anyone identify this one please?
Jim


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#2 2015-06-03 10:49:26

Laurence Clemons
DF Members
Name: Laurence Clemons
Registered: 2008-04-02
Posts: 390

Re: Calypterate ID please.

Looks like Hydrophoria ruralis (Anthomyiidae).

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#3 2015-06-03 10:49:53

Michael Ackland
DF Members
Name: Michael Ackland
Registered: 2008-06-14
Posts: 198

Re: Calypterate ID please.

The first two photos look like Hydrophoria ruralis (Anthomyiidae), based on the slight orange tinge to part of the basal tergites of abdomen.  The remaining photos don't look like this species, but I presume that it is the same specimen? This highlights the problem of identifying anthos from photos, as the lighting conditions can vary so much that relying on colour if difficult.  Unfortunately no structural (setae) characters are visible.

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#4 2015-06-03 11:49:05

Jim Jobe
DF Members
Name: Jim Jobe
Registered: 2008-04-08
Posts: 140

Re: Calypterate ID please.

Many thanks Laurence and Michael.The first two photos were taken with my compact digital camera and the others with a £12 USB microscope I've just acquired. Now that I know the genus I can try to get it definitely to species using your keys Michael.
Jim

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#5 2015-06-03 19:40:09

Michael Ackland
DF Members
Name: Michael Ackland
Registered: 2008-06-14
Posts: 198

Re: Calypterate ID please.

I am very impressed with your £12 USB microscope!  I have edited your photo regarding light etc in Picasa, and will post this as Hydrophoria so you can see the difference it makes. The plumose arista of Hydrophoria are not in focus, bu perhaps you can take several shots with different focus (stacking) and use a stacking programme to get all in focus with your USB microscope?

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#6 2015-06-04 00:06:22

Jim Jobe
DF Members
Name: Jim Jobe
Registered: 2008-04-08
Posts: 140

Re: Calypterate ID please.

Many thanks Michael; I'll try experimenting as you suggest. I've been away all day but looked at the specimen with a hand lens before I left and the genitalia are very evident so I'll submit them to my "normal" binocular microscope tomorrow in conjunction with your plate 33 and post the species here.
Jim

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#7 2015-06-04 20:09:13

Jim Jobe
DF Members
Name: Jim Jobe
Registered: 2008-04-08
Posts: 140

Re: Calypterate ID please.

I've been trying to get some decent photos of the genitalia but haven't been very successful. The USB microscope comes with a hopelessly inadequate stand which suffers badly from camera shake so I'll have to make something more suitable. Other lessons learned are: 1) Examine genitalia while fly is still fresh or extrude same with bent pin when mounting; b) mount fly upside down to prevent pin from getting in the way when photographing; c) make sure legs aren't in the way either!


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