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Syromastus rhombeus Rhombic Leatherbug
Family: Coreidae

The only squashbug with such a broad and distinctly diamond-shaped abdomen. Nymphs have very pointed abdominal tergites, each bearing a strong spine.

Adults emerge and mate in the spring; nymphs can be found June-August feeding on sandworts, spurreys and other plants in the CaryophyllaceaeA local species which was previously mainly confined to coastal areas between Suffolk and south Wales, but is now increasingly found inland in a variety of dry grassland habitats.

Adult: All year
Length 9.5-10.5 mm

see illustrated life stages chart
Syromastus rhombeus
Adult: Surrey (April 2010) ©Tristan Bantock

Syromastus rhombeus Syromastus rhombeus
Adult: Suffolk (August 2007) ©Stuart Read

Adult: Channel Isles (October 2007) ©Tim Ransom

Syromastus rhombeus Syromastus rhombeus
Adult: east London (April 2009) ©Tristan Bantock
Adult: east London (August 2008) ©Tristan Bantock

Syromastus rhombeus nymph Syromastus rhombeus nymph
Early instar nymph: west London (June 2009) ©Tristan Bantock

Late instar nymph: Essex (August 2010) ©Tristan Bantock