S. Mahunka szerk.: Folia Entomologica Hungarica 48. (Budapest, 1987)

strongly irrorated with dark greyish-brown, cellular lunule a strong, rounded spot, transversal line diffuse, sinuous, marginal field somewhat darker. Male genitalia (Figs 1-2): uncus long and slender, pointed, tegumen wide and low, vinculum strong. Fultura inferior rounded.

Valvae wide with a large extension on costal side at middle, apical part much narrower and short, cucullus with pointed apex, corona absent. Sacculus strong, clavus rounded, saccular processes asymmetrical, larger and more prominent on right valva than on left one. Harpe wide-based, relatively short and slightly arcuate. Aedoeagus strong, thick and moderately long, with a robust hook and a dentate stick on ventral side at distal end, vesica consists of three diverticles, one of them with tnree bundles of spiniform, sometimes finely curved but not wide-based cornuti. Specific differences and taxonomic position: the new species is closely related to Abrostola kaszabi Dufay, 1971, but essentially darker and much more unicolorous than the latter. It has dark grey thorax and plumbeous grey fore wing strongly reduced ochreous-yellowish irroration only in outer part of basal field, the filling of maculae is not lighter than the ground colour, the inner half of the hind wing has strong, dark irroration and diffuse pattern. In case of kaszabi the thorax and the whole basal field are ochreous, the maculae are filled with light ochreous or whitish grey, the medial field Is Irrorated with lighter grey and ochreous scales, the claviform spot is strongly marked. The inner half of the hind wing of kaszabi is much lighter, similarly to the underside of wings, especially on hind wing; the pattern of the underside is more distinct. The configuration of the male genitalia of the two related species displays also distinctive features as follows: the new species has much rounded fultura inferior without strongly sclerotized margins than that of kaszabi (Figs 3-4), the apical part of valvae have different shape with more pointed apex, the saccular processes are less robust, the distal ventral hook of the aedoeagus is less curved and has a flattened apex, the cornuti of the vesica are longer, more spiniform, without wide and elliptical base which can be observed in a group of cornuti in case of kaszabi

. On the basis of the differences of the external and genital features these two taxa should be considered as distinct species with allopatric distribution. The new species occurs in the easternmost member of the Govi Altay chain while kaszabi has a SE Siberian range since it occurs in the northern part of Mongolia (it was found again by the collectors of the new species in Ulaanbaatar) and in the SE part of Siberia in USSR (KLYUCHKO, pers. comm.). Euchalcia exornata sp.-ji. (Plate: 3-4) Type material: holotype: male, Mongolia, Baján Ölgij aimak, Mongol Altay Mts., Caast uul, 3000 m, 08-09. VIII. 1986., leg. P. GYULAI, slide No. 2159 L. RONKAY. The type is deposited in coll. P. GYULAI (Miskolc). Paratypes: 2 oo, from the same locality and data, leg. Z. VARGA, in coll. Z. VARGA. Slides Nos 2052, 2198 L. RONKAY. Description: alar expanse 34-34.5 mm, length of fore wing 16.5-17 mm. Head and palpi pale olive-grey, thorax olive grey mixed with ochreous-brown hairs, metathoracic tuft large, upper part of it greenish, lower part brownish. Fore wing high and elongate, strongly pointed: ground colour of it pale olive-grey, basal and other parts of wing strongly covered with brownish olive-green, bronze sheen of wing slight. Basal line short, nearly straight, antemedial line double, slightly sinuous, whitish, its upper part obsolescent, lower part - below celj - defined by a dark brown or blackish line on outer side. Orbicular spot large, more or less rounded, finely encircled with silvery-white, reniform narrow, elliptical, inner part of its outline whitish. Stigma large and conspicuous, silvery-white, medial line a diffuse, less visible stripe. Postmedial line slightly sinuous, double, inner side of it dark, outer part lighter, its filling grey of rosy-grey. Marginal area light, olive-greyish with more or less intensive rosaceous tinge, subterminal line whitish, finely serrate, defined by a diffuse dark stripe on inner side. Terminal field with bronze-brownish patches at apex and between veins m

3

~cuj; terminal line whitish. Hind wing whitish grey suffused with brown, inner area, transversal line and marginal area darker. Underside of wings pale ochreous grey, inner part of fore wing strongly suffused with dark grey-brown, outer third lighter; stigma and transversal lines well visible. Hind wing lighter, only transversal line and partly marginal field somewhat darker. Male genitalia (Figs 7-8): uncus strong and long, curved, its apex pointed. Tegumen wide and weakly sclerotized, moderately high. Fultura inferior a rounded lamina with a long, rostrum-like medial appendage. Vinculum V-shaped, less sclerotized. Valvae wide, relatively short, apex rounded, cucullus wide. Ampulla straight, long, slightly oblique. Sacculus short, clavus finger-like, narrow. Aedoeagus thick and moderately long, not longer than valva. Vesica consists of a large, globular basal sac and a laterally curved, narrower tube with a wide-based, long and pointed cornutus