Key to males of the species of the genus Habropogon from Russia

1. Tarsomere 5 of mesothoracic leg normal, without modified setae................................................2

- Tarsomere 5 of mesothoracic leg with modified setae (Fig. 2)..................................... H. appendiculatus

2. Distance between mystax and antennal sockets equal to or less than combined length of scape and pedicel...............3

- Distance between mystax and antennal sockets wider than combined length of scape and pedicel.......................4

3. Upper margin of mystax triangular, nearly reaching antennal sockets. Anepisternum dorsally with hairs (Figs 3, 4).................................................................................................... H. latifrons

- Upper margin of mystax rounded, not reaching antennal sockets. Anepisternum dorsally with macrosetae (Figs 5, 6)............................................................................................ H. longiventris Loew

4. Leg reddish, hind femur dorsally and usually fore- and mid-femur with dark stripe. Anepisternum anterodorsally and postpronotal lobe with long white hairs. Dorsocentral setae few in number (less than 5), not reaching transverse suture. Hypopygium reddish (Figs 7–11)........................................................................ H. mesasiaticus

- Leg black, femora and tibiae with reddish spot with indistinct boundary. Anepisternum anterodorsally without hairs, postpronotal lobe with short white hairs. Dorsocentral setae long, distinct, reaching or even crossing transverse suture. Hypopygium black (Figs 12–21)......................................................................... H. lehri sp. nov.