Peradon trilinea (Hull) Figs 17, 23, 25, 27, 100, 101, 252-254, 259

Microdon trilinea Hull, 1943: 710. Holotype ♂: Amazon (NHMUK) [examined]; Thompson et al. 1976: 67.

Peradon trilinea (Hull): Reemer and Ståhls 2013a: 146.

Studied type specimens.

Amazon Region • 1 ♂, holotype of Microdon trilinea Hull; NHMUK.

Label 1 (small, round, red-bordered): "Holo- / type"; label 2: "Amazon / 66 53"; label 3 (red): "Holotype / Microdon / trilinea / Hull".

Additional specimens.

Peru • 1 ♀; Pucallpa; 19 Apr. 1962; J. Schunke leg.; NHMUK.

Diagnosis.

Body size: male 13 mm, female 15 mm. The triangle of golden pile on the mesoscutum place this species in a group together with P. aureus, P. aureoscutus and P. trivittatus . From the first two species, P. trilinea differs by the presence of golden pile along the anterior and lateral margins of the mesoscutum. The male differs from P. trivittatus by tergite 2 being parallel-sided (widened posteriorly in P. trivittatum), and by the presence of a bulge-like, long pilose, median tubercle on the anterior 1/3 of sternite 4 (Fig. 25) (sternite 4 evenly convex and short pilose in P. trivittatus). Male genitalia as in Fig. 259. The female differs from P. trivittatus by the strongly arched sternite 3, with a wide yellowish membrane between its posterior margin and the straight anterior margin of tergite 4 (Fig. 27).

Notes.

The examined female from Peru is associated with the male holotype because of the shape of tergite 2 (flatter and more parallel-sided than in P. trivittatus), and because of the modified sternite 3 (unmodified in P. trivittatus).

Distribution.

Know from the Brazilian Amazon and eastern Peru.