S. Mahunka szerk.: Folia Entomologica Hungarica 64. (Budapest, 2003)
Thorax comparatively long and narrow, only slightly humped. Postpronotal lobe though small, well differentiated. Mesonotum covered with very dense light microtomentum, even thicker than in S. pictipes, and covered with dense short pale hairs. Four pairs of rather long but thin yellow scutellars. Acrostichal setae fine, comparatively short and biserial. Dorsocentral hairs hardly discernible among other mesonotal hairs. Anepisternum, katepisternum and meron mainly shiny black. Wings clear, large, narrow at base, broadening towards tip, apical part broadly rounded. No anal lobe. Veins ochre. Vein R, ends in costa distinctly distally to middle of wing. Costa thickened on section mg 2 . Vein R 4+5 archely curved and terminates at wing tip. Veins R 4+5 and M not parallel on a long section, almost so at apical part. Basal cells long, cross-veins meet at one point of M. Anal cell present, but small with an acute-angled upper edge. Anal vein faint but long. Squamae and haltères whitish yellow. All legs, inch femora equally slender, without any modifications or peculiar armature. Fore metatarsus without long pale hairs anteroventrally, i.e. hairs there shorter than metatarsal diameter. Legs mainly yellow. Only apical third of hind femur slightly brown darkened. Fore and mid tarsi, except for metatarsi, second fore tarsomere and entire hind tarsi dark grey infuscated, as well as whole hind tibia. Distal tip of yellow tarsomeres darkened. Mid femur ventrally with two rows of rather short black thornlets. Abdominal sclerites weakly sclerotized, male genitalia not particularly large, whole genitalia turned upwards. Cerci large and long (as usual in this genus), right cercus (Figs 9-10) shorter than in S. asiaticus and its apical part less curved, left cercus (Figs 10-11) rather simple and broad. Surstylar lamellae comparatively small (Figs 9-12), right lamella slender (at least much narrower than that of S. asiaticus), its basal process shorter and rounded apically (Fig. 9). Left lamella (Figs 1 1-12) short, bipartite, apical process conspicuously bifid; as for its basic structure, similar to that of S. asiaticus (cf. Kovalev 1977: Fig. 4), but distinctly different in details. Female not known. Etymology - The Latin specific epithet "inermis" means unarmed, which refers to the absence of long anteroventral hairs on male fore metatarsus. S. inermis sp. n. is probably closest to S. asiaticus Kovalev, 1977, which was described from Mongolia. Also the mesonotum of that species is densely microtomentose and it possesses shorter brown anteroventral hairs on male fore metatarsus but all its tarsi are darkened. Details of male genitalia are distinctly different (Kovalev 1977: Figs 1—4). In all probability S. asiaticus is not smaller (wing length is almost the same) but the abdomen of its types were more shrivelled. In contrast
