Chrysolina oricalcia (Muller, 1776)       Notable B

Female
Widespread but local throughout England and southern Scotland. and with records from north Wales, this can be very common where found. Larvae feed on cow parsley (Anthriscus sylvestris) and adults may be found among the stems and foliage from May onwards although they are adventitious and occur on a variety of low herbage. During overcast weather they rest beneath large leaves, in sunshine they frequent a range of flowers e.g. Hedge parsley or Hogweed. Around Watford adults have been found through the summer to October, they may well hibernate (Joy) but we have yet to find them beyond October. Found in a range of habitats on herbaceous vegetation, grassland edges, parkland, riparian and woodland borders.

6.5-8.5mm. Bright metallic blue to black although black specimens retain a faint blue lustre on the elytra. Pronotum broadest at base, with strongly raised side borders, glabrous and very shiny. Scutellum elongate with sides curved, with a few fine punctures mostly towards base, shining and coloured as pronotum. Elytra with strongly punctured striae, nine on each across centreline and with interstices finely and sparsely punctate (obvoius at X20). Finely microsculptured (X40) which renders the elytra dull relative to the scutellum and pronotum, this contrast being more pronounced in the female. Appendages dark but for claws which are dark yellow and two basal antennal segmants creamy below. Male tarsi more dilated as figured.

Description from 4 Watford specimens at X20


Female

Male

Female

Male

Female

Female

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