Calobata petronella
Identification: Thorax: Humeri orange/brown, this colour frequently extending down across the pleurae as far as the coxae. Mesonotum black with strong white dusting - thus always appearing as some shade of grey, the dusting may be very heavy. Pleurae also appearing grey due to dusting which is heavier than on the mesonotum.
Head: Long palpi; frons completely orange with white dusted edges against the eyes and some darkening around the ocelli.
Male: Pleural membrane white or gray. Paired pale outgrowths on sternites 3 & 4 (apices bent to point backwards) and on S5 (apex bent to point forwards). The entire complement of outgrowths are not always visible in photographs.
Distribution
Europe: Countries (2018 ), online at Fauna Europaea, Occurrences at GBIF (false records transferred from NBN Atlas)
UK: Recording Scheme map of occurrences 2016 (verified.) Online (NBN Atlas) via Easy maps or Interactive Atlas Erroneous marine records by Natural England
Neither NBN Atlas nor GBIF support record level editing.
Larvae are saprophagous in well-decayed vegetation and old manure (Ferrar 1987). Adults occur on vegetation, usually along creeks.
In Czechoslovakia the species has been recorded from lowlands up to the timber-line in mountains, but it seems to be restricted to cold habitats at low altitudes. (Jindřich Roháček, 1990)