A small, dark brown or blackish species. Length about 3 mm. The female epigyne is highly characteristic with a very long scapus, unvarying in width.

D. concolor is found in a wide variety of situations, usually at ground level. It can be found in grassland (probably being commonest on calcareous grassland), broad-leaved and mixed woodlands, hedgerows, marsh and waterside vegetation, moss, leaf litter and under ground cover such as stones and is especially common in disturbed situations. It usually occurs in small mixed-sex groups under stones, pieces of wood, rubbish, etc.

Adults of both sexes are commonly recorded throughout the year.

The species is widespread in Britain but becoming very scattered and patchy in the west and north.

Fairly frequent in Leicestershire and Rutland.

6851 British records for this species to 2013