Lispoides aequifrons ( Stein, 1898 )

Couri, Márcia & Pont, Adrian, 2020, Type specimens of Limnophorini (Diptera: Muscidae) deposited in the Museum für Naturkunde, Humboldt-Universität zu Berlin (Berlin, Germany), Zoologia (e 46879) 37, pp. 1-57 : 31

Lispoides aequifrons ( Stein, 1898)

Figs 117–120; 242–244

Syntypes. 1 male, 2 females. U.S.A.

Diagnosis. Length of body. 7.0– 7.5 mm (male, female). Head. Male dichoptic, frons about one-third of head-width. Frons dark brown. Fronto-orbital plate, parafacial, face and gena silver pruinose. Ocellar triangle brownish, very short. Fronto-orbital plate with setulae, close to antennal insertion, continuing below as far as middle of parafacial. Eye bare. Antenna dark brown; pedicel with a few setae, 2 of them longer. Arista dark brown, very short pubescent. Palpus dark brown, with many setae. Vibrissa long. Some genal and postgenal setae, as long as vibrissa, some of them curved upwards. Thorax. Scutum brown, grey dusted, with 3 brown vittae; with many fine and quite long ground-setulae in addition to the usual setae.Dorsocentrals 2+4. Haltere yellow. Calypters white. Legs.Brown, trochanters and femoro-tibial joints yellow. Fore femur and tibia with fine and long anterodorsal, dorsal and posterodorsal rows of setae, some with curled tips, especially on apical half of fore femur. Fore tibia with 1 stronger posterior to posterodorsal seta. Mid tibia inmale without median setae; in female with 2–3 anterodorsal and posterodorsal setae. Arolium and pulvillus enlarged. Wing. Clear. Costal spine short. Abdomen. Brown, grey pollinose, with a median brown vitta on tergites 3–5 and lateral triangular brown spots on tergites 3 and 4. Sternite 1 setulose. Tergite 5 with many long and fine setae.

Remarks. The species is similar to L. abnorminervis but can be easily separated by the colour-pattern of the wing and the spots on the abdomen. Keyed by Malloch (1934) in a partial key to Lispoides species. Male aedeagus as in Fig. 242 and female ovipositor as in Figs 243–244.