Sunday night I ran my last moth trap of the year 2013. Empty not a moth in sight.
But in the trap was this very small beetle.
Only 5mm in length.
1) Could it be a ground beetle?
2) Is it a small adult beetle or a juvenile which will grow bigger ?
Any help would be appreciated.
It's a Notiophilus species and, yes, a carabid. N. biguttatus is the commonest species but there are several others and I can't remember how to distinguish them. If Clive sees this he may be able to take it further but I can't, sorry.
Thanks for your reply and the genus does look like Notiophilus.
I have tried to follow the keys for Notiophilus on Watford coleoptra group web site.
The front femur look dark
Second elytra interval looks 3 times wider than third
Elytra intervals are convex and punctures course (Not smooth)
Longitudinal lines on forehead look more like 6ish than 7-10
So I'm going for Notiophilus biguttatus.
If you have time I'd appreciate your thoughts.
Many thanks for your help.
The first two characters I certainly agree with and I think you're right about the third one too. But I really can't see the head region clearly in the photo to pass on opinion about the fourth. But as I said previously, biguttatus is the commonest species.