Pterostichus niger

Pterostichus niger

Observation - Pterostichus niger - UK and Ireland. Description: large black beetle, black legs, thorax only shallowly rounded,almost straight sided at rear, squared at join. Thorax surface with finely granular surface in lines across body with defined central groove & one shorter, broader groove either side with dimpl

large black beetle, black legs, thorax only shallowly rounded,almost straight sided at rear, squared at join. Thorax surface with finely granular surface in lines across body with defined central groove & one shorter, broader groove either side with dimpled indentation at head end. Small protrusion of abdomen beyond elytra.