S. Mahunka szerk.: Folia Entomologica Hungarica 49. (Budapest, 1988)

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is Simon, 1884, as done by WUNDERLICH (1980) is rather erroneous. Therefore, I retain for both Savignya and Diplocephalus traditional limits, according to the above diagnosis of the former genus. It has recently been shown that one of the species of Araeoncus, namely the BalkanCrimeo-Caucasian A. prospiciens (Thorell, 1875), is markedly disjunct from the other congeners by both genital structure and leg chaetotaxy. Due to this, a new monotypic genus, Archaraeoncus Tanasevitch, 1987, has been erected for it. This genus seems to be only superficially close to Araeoncus

, chiefly due to the shape of the male carapace and palpal tibia (s. MILLIDGE 1977; TANASEVITCH 1987), and does not belong to the above genus-group. In my opinion, Archaraeoncus should rather be placed within the Leptorhoptrum/Lophomma group of MILLIDGE (1977). In Siberia both Diplocephalus and Savignya have been studied rather poorly. Only 9 species have hitherto been known from this vast territory: D. barbatus (L. Koch, 1879), D. cristatus angusticeps Holm, 1973, D. maculifrons Kulczynski, 1926, D. picinus (Blackwall, 1841), D. subrostratus (O. Pickard-Cambridge, 1873), S. birostrum (Chamberlin et Ivie, 1947), S. frontata (Blackwall, 1833), S. nenilini Marusik, 1988, S. producta Holm, 1977, all recorded from a few or even a single locality (cf. ESKOV 1985, 1986; HOLM 1970, 1973; KULCZYNSKI 1908, 1926; DAHL 1928; MARUSIK 1988; PICKARD-CAMBRIDGE 1873; TANASEVITCH 1985). In the course of the author's studies on the linyphiid fauna of Siberia and the Far East, a number of undescribed Diplocephalus and Savignya have emerged, as well as a new congener of Archaraeoncus prospiciens. The present paper revises the Siberian and Far Eastern fauna of these genera, with certain remarks on their taxonomy and zoogeography. Besides the author's collectings, abbreviated in the text as (KE), this paper is based on the materials taken by A.B. BABENKO (ABB), V.l. BULAVINTSEV (VB), Y.I.CHERNOV (YC), S.I. GOLOVATCI1 (SG), G. F. KURTCHEVA (GK), A. P. RASNITSYN (APR), A.B. RYVKIN (ABR), I.D. SUKATCHEVA (IS); A.V. TANASEVITCH (AVT), A. L. TIKHOMIROVA (ALT), N.V. VEKHOV (NV), E. M. VESELOVA (EV), V. V. ZHERIKHIN (VZ), (all - Moscow), A.M. BASARUKIN (AMB) (Yuzhno-Sakhalinsk), S. P. BUKHALO (SB), B. P. CHEVRIZOV (BC), N.E. DOKUTCHAYE V (ND), I. B. GRISHKAN (IG), Y. M. MARUSIK (YM), A.M. MESTCHERYAKOV (AM), A.S. RYABUKHIN (A

SR) (all - Magadan), O.V. KHRULEVA (OK) (Vrangel Island State Reserve), E.V. MIKHALEVA (EM) (Vladivostok), N.S. PORYADINA (NP) (Tyumen) and N.S. RYABININ (NR) (Khabarovsk). I am most grateful to all the above-mentioned persons whose materials serve the base of the present contribution. Before going further, I wish to particularly acknowledge the help of S.I. GOLOVATCH (Moscow), who kindly checked the English of the final manuscript, and H. SAITO (Tochigi, Japan), who kindly sent to me copies of the drawings of some undescribed linyphiids from Hokkaido. The materials treated herein have mainly become part of the collection of the Zoological Museum of the Moscow State University, Moscow; the fund materials of this museum abbreviated in the text as ZMMU. Some duplicates hava been donated to the Hungarian Natural History Mus eum, Budapest (HNHM) and the Senckenberg Museum, Frankfurt a. M. (SMF). All measurements are given in mm. DESCRIPTIONS OF THE NEW SPECIES AND FAUNISTICS Archaraeoncus sibiricus so. n. (Figs 1-6) Holotype, 6 - Taimyr Autonomous Region, Putorana Plateau, Ayan Lake, mouth of Kapchug River, vegetation of grasses and Dryas punctata in the temporary rocky bed of spring, 6. VI. 1983 (leg. KE). - Paratypes. 1 <j> - together with holotype; 3 <j> - same locality, shingle bank of stream, 25. V. 1983 (leg. KE); 16, 1 o. - Ayan Lake, source of Ayan River, herbaceous vegetation in rocky temporary bed of spring, 14. VII. 1983 (leg. KE); 2 Ä, 3 (j> Magadan Area, upper Kolyma River, Sibit-Tyellakh, Jack London Lake, shingle bank of spring, 13. VII. 1986 (leg. YM); 1 Í • environs of Magadan, Snezhnaya Dolina, small shingle island of Dukcha River, 25. VI. 1985 (leg. YM); 1 6, 1 o. (HNHM), 16, 1 o_ - Taigonos Peninsula, Topolevka River, 13.-14. VIII. 1985 (AM). Description. Total length of male/female 1.95-2.05/2.03-2.13. Carapace yellowishbrown, with a grey medial spot, its length/width 0. 85-0. 93/0. 58-0. 63 in male, 0.78-0.85/