ukbeetles.co.uk/carabus-arvensis This is a very widespread Palaearctic species; absent from North Africa but occurring throughout Europe and eastward through Asia Minor, Ukraine and Russia to Siberia and Japan.
16-20mm. Dorsal surface usually shiny metallic bronze or coppery but varies from black to green, purple or blue. Elytra with rather narrow and sloping shoulders and evenly curved to the apex; not, or only very weakly, sinuate before the apical angle. Surface sculpture consists of 3 longitudinal rows of large elongate tubercles, each separated by 2 or 3 weaker ridges which are often interrupted and flattened.
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