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| | Welcome to our newest member, Ye Olde Justin | |  | | 
04-12-2011, 11:01 AM
|  | Commander of the Wild Empire | | Join Date: Jan 2007 Location: South Northants
Posts: 3,289
| | | Fly with pied thorax and striped abdomen
Stony Stratford, Bucks.
Higher magnification shows short bristles over surface of eyes. Help with identification appreciated:  
Bruce  |
05-12-2011, 08:42 PM
| | Commander of the Wild Empire | | Join Date: Jan 2007 Location: South Northants
Posts: 3,289
| | | Re: Fly with pied thorax and striped abdomen
Looks very similar to fly posted by shenk1 on 29th November, see thread: Tiny Fly For ID
My fly measures 3.5mm excluding wing tips (measured using dorsal shot).
Bruce
Last edited by Bruce Williams; 05-12-2011 at 08:47 PM.
|
05-12-2011, 11:18 PM
|  | Knight Grand Cross of the Wild Empire | | Join Date: Jul 2007 Location: London
Posts: 11,831
| | | Re: Fly with pied thorax and striped abdomen
Yes, I agree. I did wonder about a Drosophilid for this, but now unless I'm actively studying the group on a personal level I now don't hazard a guess like I used to! |
06-12-2011, 01:48 PM
| | Commander of the Wild Empire | | Join Date: Jan 2007 Location: South Northants
Posts: 3,289
| | | Re: Fly with pied thorax and striped abdomen
Very sensible Jason - thanks .
Bruce |
06-12-2011, 07:36 PM
|  | Commander of the Wild Empire | | Join Date: Jun 2007 Location: Barnsley
Posts: 1,728
| | | Re: Fly with pied thorax and striped abdomen
Hi Bruce,
Drosophila repleta looks a good bet, but like Jason I've never studied this family in any depth.
__________________
John Coldwell |
07-12-2011, 08:42 AM
| | Commander of the Wild Empire | | Join Date: Jan 2007 Location: South Northants
Posts: 3,289
| | | Re: Fly with pied thorax and striped abdomen
Thanks John - Your suggestion let me to Google several photos and I agree D.repleta is VERY close. I also noticed that most web images gave gender - I looked hard but couldn't see any obvious clues to gender (such as the eyes on many flies) - can you/anyone help?
Bruce |
07-12-2011, 10:05 AM
|  | Commander of the Wild Empire | | Join Date: Apr 2007
Posts: 1,238
| | | Re: Fly with pied thorax and striped abdomen
According to the Insecta Helvetica key by Baechli & Burla (1985), males have 5 abdominal tergites, females 6. |
07-12-2011, 03:36 PM
| | Commander of the Wild Empire | | Join Date: Jan 2007 Location: South Northants
Posts: 3,289
| | | Re: Fly with pied thorax and striped abdomen
Thanks for your help Jerry. So if I'm counting the tergites correctly (see new photo) this one is a male? This is my favourite of the three viewpoints: 
Bruce
Last edited by Bruce Williams; 07-12-2011 at 03:38 PM.
|
08-12-2011, 10:19 AM
| | Commander of the Wild Empire | | Join Date: Jan 2007 Location: South Northants
Posts: 3,289
| | | Re: Fly with pied thorax and striped abdomen
Just in case you noticed that the dates (under signature) were different.....I made a mistake with the first two images posted, they should also read 3rd December. I only mention it to confirm that it is the same fly in all three pics.
Bruce |
08-12-2011, 11:27 AM
| | Commander of the Wild Empire | | Join Date: Apr 2007
Posts: 1,238
| | | Re: Fly with pied thorax and striped abdomen
Quote:
Originally Posted by Bruce Williams  Thanks for your help Jerry. So if I'm counting the tergites correctly (see new photo) this one is a male? This is my favourite of the three viewpoints:
Bruce | Sorry, I'm afraid I can't help much more. I only bought the key because it was going cheap and I was ordering other books at the same time: I wanted it for the Leucophenga species where the larvae live in fungi, and I might rear them out. Your pictures were a nice opportunity to have a quick look at the keys.
There is a diagram of lateral view of a female in the key, but not one of a male, and the nice colour plates are not annotated with the sex. The diagram shows the last tergite on the female being narrow at the dorsal side and triangular in appearance laterally. The anal and vaginal plates are also shown as obvious beyond this tergite, and in your specimen there is something similar, but the angle is not right for adequate detail.
I suggest looking at a few images of Drosophilidae at diptera.info for comparison purposes.
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