Posted by Fred Fly on 21-01-2019 19:43
#11
I think it is Malloch (1933): Diptera of Patagonia and South Chile Part VI. Fascicle 4.- Acalyptrata (Heleomyzidae, Trypetidae, Sciomyzidae, Sapromyzidae, etc.): 177-389.
Prosopantrum covers page 199-208. 10 species included in a key and described.