Biosteres (Chilotrichia) advectus Papp, 1979

Material collected: Iran, Mazandaran province: Tangehvaz (36°21′55″N, 52°06′10″E, 692 m a.s.l.), 5.IX.2011, 1 ♀, leg.: M. Khayrandish.

Diagnosis (Female): Body length 2.7 mm (Fig. 3A); antenna with 37 antennomeres, longer than body; head behind eyes not narrowed (Fig. 3B); width of clypeus 2.0× its maximum height, with long hair (Fig. 3C); mandibles gradually widened basally (Fig. 3C); oral cavity not developed (Fig. 3C); length of eye in dorsal view as long as temple (Fig. 3D); mesonotum with medio-posterior mesoscutal depression (Fig. 3E); notauli smooth (Fig. 3E); precoxal sulcus crenulate or rugose (Fig. 3F); pterostigma narrow, elongate, 3RSa vein as long as 2RS vein, m-cu vein interstitial, vein r originating almost middle of pterostigma, marginal cell almost reaching apex of wing (Fig. 3G); first metasomal tergite 1.3× as long as its width at apex, gradually narrowing toward base; metasomal tergites black, metasomal sternites light brown; legs brownish yellow (Fig. 3H); ovipositor sheaths short and not extended beyond apex of metasoma.

Distribution in Iran: Mazandaran Province (current study).

General distribution: Western Palaearctic (Yu et al. 2016) and Iran (new record).