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| 1 | 2 |  » Stats |
Members: 50,150
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| | Welcome to our newest member, RichardB | |  | | 
10-04-2010, 06:29 PM
| | Officer of the Wild Empire | | Join Date: Sep 2007 Location: Caldbeck, Cumbria
Posts: 766
| | | Green ground beetle
Found on a riverbank today. 10mm long. I wondered if it was Harpalus affinis, but I'm not sure whether the legs are too dark.  |
10-04-2010, 06:34 PM
|  | Knight Grand Cross of the Wild Empire | | Join Date: Nov 2006 Location: North Yorkshire
Posts: 10,729
| | | Re: Green ground beetle
Poecilus cupreus, not to common in the North. Also more common in dry habitats. |
10-04-2010, 07:02 PM
| | Officer of the Wild Empire | | Join Date: Sep 2007 Location: Caldbeck, Cumbria
Posts: 766
| | | Re: Green ground beetle
Thanks Dogghound. Is this the same as Pterostichus cupreus ? |
10-04-2010, 07:07 PM
| | Knight Grand Cross of the Wild Empire | | Join Date: Nov 2006 Location: North Yorkshire
Posts: 10,729
| | | Re: Green ground beetle
Yes same species. |
10-04-2010, 08:13 PM
| | Officer of the Wild Empire | | Join Date: Sep 2007 Location: Caldbeck, Cumbria
Posts: 766
| | | Re: Green ground beetle
Hello again Dogghound
As the legs are uniformly black could it be Pterostichus versicolor ? Harde's field guide says they are often mistaken for each other & that this is a distinguishing feature. |
10-04-2010, 08:21 PM
| | Officer of the Wild Empire | | Join Date: Dec 2008
Posts: 828
| | | Re: Green ground beetle
Hi there...i was just about to come on and suggest Poecilus versicolor. The setae on the hind tibiae and the unpunctured frons seem right for this species...though i could be looking at it all wrong? |
11-04-2010, 07:44 AM
|  | Commander of the Wild Empire | | Join Date: Jun 2007 Location: Barnsley
Posts: 1,727
| | | Re: Green ground beetle
The punctured/unpunctured head is the best character. Not quite sharp, unfortunately, but I believe I can detect punctures, therefore I agree with the Dogg. I would have expected to see more hind-tibial setae, however, so I think there is an element of uncertainty. Leg colour not relevant.
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John Coldwell |
11-04-2010, 08:01 AM
| | Officer of the Wild Empire | | Join Date: Sep 2007 Location: Caldbeck, Cumbria
Posts: 766
| | | Re: Green ground beetle
Hello John
I've had a look with the microscope and I can't see any pits on the top of the head. Looking at the NBN Gateway maps P.versicolor is more likely in Cumbria. The size also fits better.
Peter
Last edited by peterbolson; 11-04-2010 at 08:20 AM.
|
11-04-2010, 03:08 PM
| | Commander of the Wild Empire | | Join Date: Jun 2007 Location: Barnsley
Posts: 1,727
| | | Re: Green ground beetle
That seems pretty conclusive then 
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John Coldwell |
11-04-2010, 03:39 PM
|  | Knight Grand Cross of the Wild Empire | | Join Date: Jul 2007 Location: London
Posts: 11,830
| | | Re: Green ground beetle
Afternoon Peter,
The good old microscope - nice and conclusive. What magnification are you using?
Take care, Jason  | | | |
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