AppearanceSeparating R. viridis and R. chlorosoma can be tricky. Both species have a variable amount of black but R. chlorosoma is generally paler. The best character is the relative length of the pads on the back of the tarsal segments (called pulvilli) - these are about half the length of the following segment in (female) chlorosoma but shorter in viridis. A thin black line in the groove on the side of the thorax is often a good clue for viridis too but not entirely reliable as there is sometimes a trace of a line in chlorosoma too.
HabitatAdults visit a range of habitats hunting for small insects on flowers.
ReproductionIt flies from May to August
Some text fragments are auto parsed from Wikipedia.http://www.naturespot.org.uk/species/rhogogaster-viridis