S. Mahunka szerk.: Folia Entomologica Hungarica 48. (Budapest, 1987)
situated laterally from the axis of the basal sac of vesica. Female genitalia (Fig. 9): Ovipositor short and wide, gonapophyses moderately long. Ostium bursae membranous, protected by a rounded membrane; ductus bursae relatively short, caudal part of it with a short membranous tube, proximally continued in a heavily sclerotized tube which is strongly dilated to a large and semiglobutar extension and connected to bursa copulatrix with a wide, sclerotized field with strong crests and a nearly quadrangular sclerotized lamina. Apex bursae membranous and rounded, corpus bursae long, more or less elliptical. Specific differences and taxonomic position: the species belonging to this group are very similar to each other by their external and genital characteristics, too. The new species is closely related to Euchalcia renardi (Eversmann, 1844) but differs from it by a series of distinctive features. The size of exornata Is essentially bigger, the shape of fore wing is wider with more pointed apex. The median area of the new species is broader and conspicuously darker as compared with the basal and marginal areas than in the case of renardi . In the configuration of the male genitalia the range of variation of the main features of exornata and renardi is partly overlapping, except the characteristic structure of the vesica by which the two species can be separated relatively easily. In case of exornata the distal tube of vesica is narrower than that of renardi (Figs 5-6) and twisted from the basal sac much more laterally, therefore, the cornutuB situated laterally from the medial axis of the organ (the granulation of the distal tube is also stronger than that of renardi ) . In case of renardi the distal tube is not or only very slightly twisted so the cornutus is situated in the medial axis of the copulatory organ. (Several slides of renardi display that this character is not only an artificial phenomenon.) In the configuration of the female genitalia the ostium bursae of ex ornata is wider, the ductus bursae is longer and Its anterior part is much more dilated than in the case of renardi . The sclerotization of the last tergite is also characteristic, because e xornata has a very strong and wide, quadrangular medial lamina and wide, short arms on the tergite VIII (Fig. 11) and renardi has a narrow, elongate medial lamina and slender arms (Fig. 12). The other similar species, E . altaica Dufay, 1968 has nearly the same size and wing shape, the main difference in the wing pattern is that the shape of the orbicular spot Is strongly flattened and elongate in the case of altaica , while the same is large and more or less rounded in the case of exornata . The male genitalia of exornata is essentially smaller than that of altaica, principally of the aedoeagus, which is significantly longer than the valva in the case of altaica , while it is a little bit shorter than the valva in exornata. The sclerotization of the last tergite is also very different (see DUFAY, 1968). In the configuration of the female genitalia the apex bursae of altaica is rugulose and constricted (see KLYUCHKO, 1983) while in the case of exornata it is membranous and rounded. The species of this group - altaica , renardi and exornata -have a nearly sympatric occurrence in the Altay Mts., but the new species was found at a very high altitude in the alpine region. On the other hand, the closely related renardi Inhabits mainly the subalpine, dense grassland habitats (up to 2400 m in this region). Fig. 11: Euchalcia exornata sp. n., holotype; sclerotization of tergite VIII Fig. 12; Euchalcia renardi (Eversmann); sclerotization of tergite VIII
