At least five individuals found on the flowers of carrots that I have left to go to seed. The markings are quite variable, as is the particular shade of orange of each individual. Five photos uploaded.
I think these are eggs from Paropsisterna beata. Several batches of eggs seen on the same tree as larvae and adults. A robber fly was at one lot of eggs, and small wasps (present in this image) were quite interested in others.