Although the levels of pigmentation in the abdomen vary considerably, the two dark spots of pigment on the posterior margin on either side of the midline of the fourth abdominal segment are always present.

Submissions need to show dorsal pigmentation clearly. 

Most frequent under surface debris such as recently fallen branches and planks of wood, but it is known from many other similar sites at ground level.

All year round.

Widespread and very common in Britain.

Fairly frequent in Leicestershire and Rutland.