[Adastra] Beetle on Aspen

[SARAH PATTON]

Many thanks Peter, it is indeed populi. Could you have a look at the other beetle I posted which would seem to be either Cassida vittata or C. nobilis. It has lost the green colouration now.
   
  Sarah

Peter J Hodge <peter.j.hodge at tesco.net> wrote:
  Sarah,

Chrysomela populi has a tiny black spot covering the extreme apex of the 
elytra whereas in C. tremulae they are entirely red. I believe the shape of 
the pronotum also differs slightly. Both feed on Aspen but C. tremulae 
appears to be extinct or almost extinct in Britain.

Peter Hodge.

----- Original Message ----- 
From: "SARAH PATTON" 
To: "Adastra" 
Sent: Wednesday, June 06, 2007 11:40 AM
Subject: [Adastra] Beetle on Aspen


> Can anyone give me any features for distinguishing Chrysomela populi from 
> C. tremulae? I found one of them on a young Aspen yesterday, but can't 
> find any reference to distinguish which it is.
>
> Thanks
> Sarah
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