S. Mahunka szerk.: Folia Entomologica Hungarica 62. (Budapest, 2001)

18 (21) Abdomen, except the first tergite red. 19 (20) Longest setae of sawsheath form an obtuse angle. Sawsheath in Haris 2000, Fig. 109. Smaller, 6.5-7.5 mm. D. japonicus Kirby 20 (19) Longest setae of sawsheath form an acute angle. Sawsheath and serrulae in Haris 2000, Figs 40 and 104. Larger, 7.0-9.0 mm. D. germanicus (Fabricius) 21 (18) Abdomen only with red band. 22 (23) Longest setae of sawsheath form an obtuse angle. Pronotum, middle mesonotal lobes, tegulae red. Lateral lobes more or less red or black. Abdominal tergites 4-5 (6) red. Sawsheath in Haris 2000, Fig. 113. 8.0-9.5 mm. D. armillatus Konow 23 (22) Longest setae of sawsheath form an acute angle. Wings hyaline. Serrulae and sawsheath in Haris 2000, Figs 36 and 98. 9.0-10.5 mm. D. subfasciatus Smith 24 (17) Legs entirely black. Mesopleuron roughly punctured but without crater-like punctures. Abdomen, thorax mainly red. Serrulae 4-6 and sawsheath in Haris 2000, Figs 47 and 120. 9.0-10.5 mm. D. harukawai Waterston Males 1 (18) Abdomen black frequently with metallic luster. Abdominal tergites with transverse surface sculpture. Thorax sometimes coloured with dark red and/or legs with yellow. Mesopleuron roughly punctured but without crater-like punctures. 2 (5) Legs coloured with yellow. 3 (4) Lateral lobes of mesonotum hardly punctured. Apices of femora and basal parts of tibiae always reddish yellow. Penis valve in Haris 2000, Fig. 130. Smaller, 8.0-9.0 mm. D. gonager (Fabricius) 4 (3) Lateral lobes of mesonotum clearly and densely punctured. Legs black, fore tibiae entirely reddish yellow. Penis valve in Haris 2000, Fig. 178. Larger, elongate species, 8.0-10.0 mm. D. ephippiatus Smith 5 (2) Legs entirely black. 6 (11) Thorax coloured with dark red. 7 (8) Body shining black. Only lateral lobes of mesonotum red. Penis valve in Haris 2000, Fig. 148. 8.5-10.0 mm. D. yokohamensis Rohwer