Hylaeus (Hylaeus) sibiricus (Strand, 1909)

Prosopis sibirica Strand, 1909: 74 –75, Ƌ (holotype—Ƌ, ”Siberia, Smolenschina” [near Irkutsk, Irkutsk Prov., Russia], MNHU).

Prosopis sjoestedti Alfken, 1936: 9 –10, ♀, Ƌ (type locality: South Kansu, China). Hylaeus communis excurrens Cockerell, 1937: 5 –6, ♀ (type locality: Irkutsk Prov., Russia). Hylaeus sibiricus: Dathe 1986a: 287; Proshchalykin & Dathe 2012: 17; 2016: 313.

Material examined. Mongolia. Uvs Aimag: 1 ♀, Tarialan, Kharkhiraa, 17.VII.1989, K. Seidelmann (SDEI); Zavkhan Aimag: 3 ♀, 17 ♂, 40 km SW Ulyastai, dunes, 18.VII.2005, JH, MKA (OLBL); Arkhangai Aimag: 1 ♀, 5 ♂, Mongol Els nat. res. [47º24'N 103º39'E], 1320 m, 31.VII.2005, JH (OLBL); Bayan-Khongor Aimag: 1 ♀, 1 ♂, 86 km NW Bayan-Khongor, 2070 m, 14.VII.2004, MKА (OLBL); Uvurkhangai Aimag: 3 ♀, Bulgan, 143 km NE Arbai-Khere, 1300 m, 26.VII.2004, JS; 2 ♀, 1 ♂, 137 km SE Arbai-Khere, 1250 m, 2.VII.2004, JH, JS; Tuv Aimag: 1 ♀, Syutszukte, SE Kentei, 13.VI.1925, PK (ZISP); 1 ♀, Tola River Valley, 1–10.VII.1926, PK (ZISP); 1 ♀, Ulaanbaatar, 26–30.VI.1994, JC (SDEI).

Distribution in Mongolia. Uvs Aimag, Khovd Aimag, *Zavkhan Aimag, *Arkhangai Aimag, *Bayan- Khongor Aimag, *Uvurkhangai Aimag, *Umnugovi Aimag, *Tuv Aimag (Fig. 4 a).

General distribution. China (Jilin, Gansu), Mongolia, Russia (Asian part).