Status: Widely scattered in Wales and southern England
Habitat: Various
Host plant: Sedes and rushes, also galingales (Cyperus spp).
Overwintering: Probably as adults in moss on wood.
Food: Life cycle unknown, but larvae possibly in stems.

Status: Common and widespread.
Habitat: Various
Host plant: Various grasses, wild and cultivated (i.e. cereals)
Overwintering: Adults in grass tussovks, haystacks and moss (including Sphagnum)
Food: Adults on leaves, larvae in the stems
Other notes: Can be pests of cereal crops. Adults parasitised by the braconid wasps Perilitus cerealium and P. bicolor.

Status: Widespread but local in England and Wales.
Habitat: Various habitats, usually wet.
Host plant: Various sedges, also purple moor-grass Molinia caerulea, possibly also rushes.
Overwintering: Adults in moss and grass tussocks.
Food: Adults on leaves, larvae on roots.
Other notes: Unidentified braconid wasp larva is an internal parasite.

Status: Very local around the coast. Scarce (Notable A)
Habitat: various coastal habitats
Host plant: Sedges, rushes, sea-milkwort (Glaux maritima)
Overwintering: Probably as adults.
Food: Unknown, though adults assumed to be leaf-feeders
Other notes: Palaearctic and can be inland outside Britain, including at altitudes over 1000m.

Status: Common and widespread.
Habitat: Almost any except high altitude moorland
Host plant: Various Polygonaceae and Chenopodiaceae; also lesser periwinkle Vinca minor, yew Taxus buccata and birches Betula spp.
Overwintering: As adults, some survive to hibernate a second time.
Food: Adults on leaves of non-woody hosts and sometimes pollen (e.g. of chamomile Chamaemelum nobile); larvae on roots of hosts, forming fine galleries.
Other notes: Can damage sugar beet crops. Take care to separate from C. picipes.

Status: Widespread but scattered (not known from Scotland)
Habitat: Various
Host plant: Various Polygonaceae and oraches Atriplex spp.
Overwintering: Adults hibernate
Food: Adults on leaves; larval feeding unknown.
Other notes: Take care to separate from C. concinna which is commoner and more widespread. Known to attack oilseed rape and beets in continental Europe.

Status: Very few records, possibly extinct (if not, then very rare) but specimens should be sought in suitable habitat containing the host plant.
RDB Category: Insufficiently Known (RDBK)
Habitat: Fens, marshes and other wet places where the host plant grows.
Host plant: Spike-rushes (Eleocharis spp.)
Overwintering: Unknown
Food: Presumably leaves of host plants
Other notes: Adults show adaptations to semi-aquatic life e.g. synchronised front & middle legs allow skating on the surface film, and they have the ability to trap an air bubble beneath the head and thorax.