|The first of the two reed beetles; note the bright green elytra and pronotum and the long back legs.|
|A closer look - see the dents on the side of the pronotum and the pattern of wrinkles with a longitudinal marks down the middle. You can also see that the elytra are hairless.|
|A close-up of the head; this may not be needed for identification, but the fine detail is fascinating, including the sculpturing (a central groove matches the one on the pronotum), prominent eyes and tiny hairs.|
|Even closer still; looking at the fine detail of the elytra, you can see the punctures clearly and on the surfaces between them some fine 'microsculpturation' i.e. the surface looks shiny but isn't completely smooth.|
|Zooming in on the hind tibia, a series of tiny teeth are visible on the ventral ridge.|
If you are interested in British reed beetles, Menzies & Cox (1996) is excellent (and available as an unbound reprint for a few pounds) and will form the basis for the Donaciinae section of my forthcoming key to British chrysomelids. It also provides keys to separate the different genera (Donacia, Plateumaris, Macroplea), something I will cover in a subsequent article.
Menzies, I.S. & Cox, M.L. (1996). Notes on the natural history, distribution and identification of British reed beetles. British Journal of Entomology and Natural History 9: 137-162 + 2 pp. of colour plates.