“…fusca larvae in the rearing medium mainly pupated by securing the posterior end to the exposed part of the brick, presumably because the drier environment improves survival of the flies (McPheron & Broce, 1996), but pupation also took place at the surface of the medium. Mathis (1980) reports that S. fusca adult flies are attracted to light at night. The pupae, like the eggs, mainly adhere to the solid surfaces above the liquid manure flow, and together with the larvae, they may assemble in such masses (Figure 1) as to block drains and sewage pipes (Smith, 1989).…”