Subgenus Euhilarella Townsend, 1915

Euhilarella Townsend, 1915: 22 .

Type species: Gymnoprosopa fulvicornis Coquillett, 1895; by original designation.

Phrosinella (Euhilarella): Verves, 1980: 30.

Phrosinella: Allen, 1926: 68; Shewell, 1987: 1185 [in key]; Pape and Dahlem, 2010: 1318.

Dark colored midsized flies (5.0–8.0 mm in length). Frontal stripe distinctly more widened than one of parafrontalia; lower margin of head moderately shortened; abdominal tergites with dark spots and stripes; 2nd tarsomere of ♂ fore tarsi with a tuft of long hairs; R 1 bare dorsally; R 4+5 haired from base to the middle of its 2nd section. Seven species in Holarctic.

Habits: The flies occupy the ground-subterranean stratum, being found in the adult stage largely on barren ground; in and about the holes of burrowing Hymenoptera, rarely on low foliage. Larvae develop in hymenopteran ground nests in sandy areas (Allen, 1926; Evans and O’Neil, 1988).