Posted by John Carr on 03-05-2021 19:10
#5
The reference cited by Ball in his key to British Scathophagidae is
De Jong, H., 1985. Norellia spinipes (Meigen) in the Netherlands and its distinction from N. tipularia (Fabricius) (Diptera: Scathophagidae). Ent. Ber., Amst., 45, 21-23.