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I have just verified it using Bratt et al (1967), Biology of Pherbellia and Vala (1989) Sciomyzidae in Faune de France 72. It is unmistakeble D. grisescens for it has a concave cephalic cap (best seen in lateral view), an almost unique feature, only sharing it with the nearctic Ph. humilis. Further diagnostic features are the presence of lateral spinule bands on all segments, absent or in only a few abdominal segments in Pherbellia