There are over 25,000 species of Carabids (ground beetles) in 1500 genera world wide, 2,600 specie in Europe and over 350 in the UK. The fossil record goes as far back as the Permian. They are usually found on the ground and can run fast. The adults range in length from 3 - 36 mm, and are mainly nocturnal. Many of the European carabids are voracious predators of snails, slugs and many other invertebrates, so should be cherished by gardeners. In areas where the weather is cold, many species hibernate during the winter.
The photograph above and drawing below below show a typical carabid larva. The abdomen has 10 segments including the anal tube, 3 leg-bearing segments making up the thorax, and 1 head segment.
The typical carabid adult is shown in the photograph below of Cychrus caraboides, note the long, filiform antennae, legs thin and long for fast running, and huge jaws for crushing and dismembering prey.