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

14(1) Abdomen from the on 2nd and 3rd tergites on smooth and shining without surface sculpture visible at 45 times magnification 15 (56) Legs with at least the front knees red or rarely yellowish-brown 16 (27) Abdomen black sometimes with reddish-brown shadow 17(18) Smaller species, 6.5 mm. Labrum, tegulae, four anterior knees and anterior tibiae yellowish-brown. Body black. Clypeus deeply emarginated. Mesonotum poorly shining, punctures little sparser on the middle parts of the lobes. Scutellum rugose, metascutellum with coarse punctures sachalinensis Takeuchi 18 (17) Larger species, pale parts of the body not yellowish-brown 19 (20) Tegulae and for knees red. Body black, middle of abdominal tergites with reddish-brown shadow. Penis valve in Fig. 192. 7.0-8.0 mm scoticus Cameron 20(19) Tegulae black. 21 (22) Body entirely black, including legs. Penis valve in Fig. 184 laevigatus Hellén 22 (21) At least the legs with red markings 23 (24) Smaller species, 7.0-8.0 mm. Body black, only fore tibia and fore knee red. Wings infuscated. Penis valve in Fig. 198 japonicus (Kirby) 24 (23) Larger species, 9.0-11.0 mm. Wings hyaline 25 (26) Body black, apices of fore femora, fore tibiae entirely and middle knees red. Vertex roughly and densely punctured, temples roughly punctured with shining interspaces, about 2-4 times as large as a puncture. Mesonotum densely and uniformly punctured. Penis valve in Fig. 197. 9.0-9.5 mm armillatus Konow 26 (25) Body black, fore and middle legs coloured with dark reddish-brown. 9.0-11.0 mm. Penis valve similar to that of D. gessneri Ed. André, however, its dorsal margin convex (not straight) and ventral margin straight (not concave). (Black colour variation the former D. picinus Marlat) subfasciatus Smith 27 (16) Abdomen entirely or partly red 28 (29) Basal 1/4 of costa mainly yellow. Head and thorax black, tegulae red. First and apical segments black, 2nd-6th red. Penis valve in Fig. 185. 9.0-10.0 mm lucidus Freymuth 29 (28) Costa entirely or nearly entirely black 30 (49) Hind tibiae dominantly black 31 (34) Smaller species, 5.0-6.5 mm 32 (33) The smallest Dolerus species, 5.0-6.0 mm. Head and thorax black. 2nd-5th abdominal segments red. Red segments with black spots, especially on the lateral side of the last red segments. Clypeus emarginated to one-third of its median length. Penis valve in Fig. 186 elderi Kincaid 33 (32) Somewhat bigger species, 5.5-6.5 mm. Red abdominal segments without black spots. Clypeal emargination about half as long as its median length. Penis valve in Fig. 187 subarcticus Hellén 34 (31 ) Larger species, 7.0-11.0 mm 35 (36) Mesonotum partly red. Sometimes entirely red, or with more or less extensive black spots on lateral and fore lobes. Red spots may occur on mesopleuron. First and apical segments of abdomen black. Wings infuscate. Penis valve in Fig. 188. 8.0-9.0 mm lepidus Konow