S. Mahunka szerk.: Folia Entomologica Hungarica 61. (Budapest, 2000)

4 (15) Longer hairs on the sawsheath evenly curved and directed strongly backwards from the base (Figs. 72-73). Fore lobes of the mesonotum punctured all over although more densely at the sides 5 (8) Upper part of head and mesonotum and mesopleuron clothed in dense woolly pubescence much longer than apex of fore basitarsus. Sawsheath as in Fig. 72. 6 (7) Clypeus with its front margin sharply incurved and emarginate to a depth of much less than half of its total length. Sawsheath in Fig. 72, 4th-6th serrulae in Fig. 14. 9.0-10.5 mm. - Rare. Europe megapterus Cameron 7 (6) Clypeus similar with D. megapterus Cameron, however, abdominal tergites 1-3 smooth and shining, 4th—7th polished only medially. Sawsheath and serrulae as in Figs 72 and 14. (Possible synonym of D. megapterus Cameron. Its validity is not confirmed.) - Tibet, China tibetanus Wei et Nie 8 (5) Upper part of head and mesonotum with short pubescence. Longest hairs scacerly longer than the diameter of an ocellus. Pubescence on middle of mesopleuron shorter than apex of fore basitarsus. Clypeus almost flat and usually emarginated to a depth of the half of the clypeal length. Sawsheath in Fig. 73. 9(12) Pubescence on head, mesonotum and mesopleuron dense, and in profile much of this is seen to be as long as, or even longer than, the diameter of an ocellus. 10 (11) Abdominal tergites from the 2nd on with well-developed transverse sculpture. Sawsheath as in Fig. 73, 4th—6th serrulae in Fig. 15. Smaller, 8.5-10.0 mm. Rare. N. and C. Europe, Ukraine, Baikal harwoodi Benson 11 (10) At least the 2nd tergite partly smooth and shining. Sawsheath as in Fig. 73. Larger, 10.0-11.0 mm. - Rare. N. and C. Europe gibbosus Hartig 12 (9) Whole body with sparse and very short pubescence; hairs on the head and on the mesopleuron above are seen in profile is less than diameter of an ocellus. 13 (14) Clypeus roundly emarginated. Sawsheath in Fig. 73, 4th-6th serrulae in Fig. 17. 8.5-10.0 mm. - Holarctic species. Sporadic asper Zaddach 14 (13) Clypeus triangularly excised. Sawsheath as in Fig. 73. 10.0-11.0 mm. - Rare. Austria, Italy and Russia docilus Benson 15 (4) Longer hairs on the sawsheath more strongly curved apically than basally and directed more outwards from the base (Figs 74-78) 16 (27) Pubescence on the middle of mesonotum about as long as diamater of an ocellus 17(18) Smaller species, 7.5-8.5 mm. Fourth antenna! jointh much longer than third (11: 14). Wings hyaline. Sawsheath in Fig. 74, 4th—6th serrulae in Fig. 16. Sporadic in the French Alps hibernicus Lacourt 18 (17) Larger species 8.0-10.5 mm. Third antennái joint longer or subequal with the fourth 19 (20) Fore lobes of mesonotum densely and uniformly punctured. Body matt. Wings sligthly but clearly infuscate. Sawsheath as in Fig. 78, 4th-6th serrulae in Fig. 18. - Sporadic. Armenia, Turkey, Transcaucasia nonultimus Zhelochovtsev 20 (19) Fore lobes of mesonotum densely punctured laterally, the middle and front parts more or less sporadically punctured. Body with or without metallic reflection