Figs 19, 20 in Studies on the systematics and taxonomy of the genus Hylaeus F. (10) New descriptions and records of Asian Hylaeus species (Hymenoptera: Anthophila, Colletidae)

Figs 19, 20: Hylaeus (Hylaeus) tsingtauensis (STRAND): head in frontal view. – 19 Male from Sichuan, near Maoxian, China. – 20 Holotypus female from Qingdao ("Tsingtau"), China, coll. SDEI. – Scale 0.5 mm.