The species is 8.5–12 millimetres (0.33–0.47in) long and is black coloured with colourful metallic reflections on its shin. Their surface is metallic bronze, green or blue coloured.[1]
Distribution
Harpalus affinis is present in the Palearctic realm, from Europe to Siberia.[1] It was introduced in North America and is now present in several Canadian provinces, from British Columbia to the Maritimes.[2] It became established in New Zealand in the mid to late 1970s.[3]
Larva
The newly hatched larvae are termite-formed. The process of hatching is happening in mid-May. When hatched, the larvae measure 4mm in length and have orange and small head. The abdomen is dark grey at the end, and bigger. The second instar larva is around 10 mm, with large dark orange mandibles and the head , and pronotum. The abdomen is light grey and more different than the larva of H. pensylvanicus and H. capito, who are darker. Legs with big and orange tarsi. The development lasts for three months https://upload.wikimedia.org/wikipedia/commons/4/4e/Newly_hatched_larva.jpg
↑ Lindroth, Carl H. (1968). The Ground-Beetles (Carabidae, excl. Cincidelinae) of Canada and Alaska, Part 5. Opuscula Entomologica.
↑ Townsend, J. I. (1992). "Harpalus affinis (Schrank)(Coleoptera: Carabidae) recently established in the North Island of New Zealand". New Zealand Entomologist. 15 (1): 25–29. doi:10.1080/00779962.1992.9722624.
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