Disogmus obsoletus Brues, 1905

Material examined: 3 ♂♂; Iran, Mazandaran province, Noor, Chamestan, Tangehvaz (36°18′51.42″N, 52°07′48.00″E, 1353 m a.s.l.), 09-VI-2011, 3 ♂♂; leg. M. Khayrandish .

Diagnosis: Male (Figure 3a): Length of body 3.3–3.5 mm; flagellar segments exceptionally short, the third segment about 1.7 times as long as wide, flagellum with tyloids on flagellar segments 3–6, the tyloids in the form of a high ridge that is about 0.8 times as long as the segments (Figure 3b); notauli reaching beyond center of mesoscutum; forewing venation as in Figure 3c, stigma small, r-rs vein (vertical part of radius) about 3.0 times as long as wide, radial vein runs from apical 0.3 of stigma, radial cell long, the side next to costa (1-R1) about 2.3 times as long as width of stigma.

Distribution: Canada, Russia, USA (Townes and Townes, 1981; Kolyada, 1998), and Iran (new record).

Biology: Unknown.