Hesperus borneensis group

Diagnosis: Slightly modified from that of Schillhammer (2002, 2016), the group can be defined by the following characters: body broadly elongate with head trapezoid; antennae with antennomeres 7–10 asymmetrically extended; abdomen with tergites III–V with two basal lines; apical portion of male sternite IX with stout and long setae; median lobe rod-like, apical portion slightly bent dorsad in lateral view, lateral margin of apical portion of paramere with large number of peg-setae.

Distribution and diversity: The group is presently known from the Sunda region, India, Myanmar, Thailand, Laos, southwestern and southern China, and it includes the following species: H. borneensis Bernhauer, 1915, H. birmanus Cameron, 1932, H. javanus Cameron, 1937, H. malayanus Cameron, 1932 a, H. temburong Schillhammer, 2002, H. watanabei Shibata, 2002, H. wemmeri Schillhammer, 2002, H. susannekontrusae Schillhammer, 2005, H. rougemonti Schillhammer, 2016 and H. flexibilis sp. n. .