Contents

Marusik Y. M. & Koponen S.
   New and little known spiders of the subfamily Dictynidae (Araneae: Dictynidae) from South Siberia

Vrabec V. & Jindra Z.
   The caterpillars of the rare butterfly Euphydryas maturna (Lepidoptera: Nymphalidae) as food for the predatory bug Picromerus bidens (Heteroptera: Pentatomidae)

Janák J.
   Eine neue Art und neue Funde der Gattung Stenus aus Uganda (Coleoptera: Staphylinidae)

Ji L. & Jäch M. A.
   Description of Eupotemus gen. nov. (Coleoptera: Epimetopidae) and world check list of the species of Epimetopidae

Jäch M. A., Aguilera P. & Hernando C.
   New and little known Palearctic species of the genus Hydraena (s.l.) V (Coleoptera: Hydraenidae)

Hendrich L. & Balke M.
   A new species of Platambus Thomson (s.str.) from Northern Laos (Coleoptera: Dytiscidae)

Ribera I. & Millán A.
   Limnebius aguilerai sp. nov. from south Morocco (Coleoptera: Hydraenidae)

Schödl S.
    Taxonomic revision of Enochrus (Coleoptera: Hydrophilidae) I. The E. bicolor species complex

Zettel H.
   Four new species of Hydrotrephes(Heteroptera: Helotrephidae) from Thailand and Laos

Vít S. & Hlaváč P.
   Review of Euconnus (Tetramelus) of the reitteri group (Coleoptera: Scydmaenidae)

Schimmel R.
   Neue und wenig bekannte Schnellkäfer aus Südostasien (Coleoptera: Elateridae)

Marusik Y. M. & Koponen S. 1998. New and little known spiders of the subfamily Dictynidae (Araneae: Dictynidae) from South Siberia. Entomol. Probl. 29 (2): 79-86.

Seven species of Dictynid spiders are described: Ajmonia lehtineni sp.nov. (Mongolia), Emblyna mongolica sp.nov. (Tuva, Mongolia), Emblyna kaszabi sp.nov. (Mongolia), Emblyna logunovi sp.nov. (Tuva, Mongolia), Dictyna ubsunurica sp.nov. (Tuva), Dictyna obydovi sp.nov. (Tuva). Emblyna burjatica (Danilov, 1994) comb.nov. and Dictyna sotnik Danilov, 1994 are redescribed and the male of E. burjatica is described.

Vrabec V. & Jindra Z. 1998. The caterpillarsof the rare butterfly Euphydryas maturna (Lepidoptera: Nymphalidae) as food for the predatory bug Picromerus bidens (Heteroptera: Pentatomidae). Entomol. Probl. 29 (2): 87-90.

The strong invasion of caterpillars by the predatory pentatomid Picromerus bidens (Linné, 1758) was observed during a study on the population ecology of the rare butterfly Euphydryas maturna (Linné, 1758) in the territory of Central Bohemia. Natural control by P. bidens can be a very important factor for the survival of a population of E. maturna in the conditions described. This observation is reported with more details in a short note.

Janák J. 1998. Eine neue Art und neue Funde der Gattung Stenus aus Uganda (Coleoptera: Staphylinidae). Entomol. Probl. 29 (2): 91-93.

A new species of the genus Stenus Latreille, 1796 from Entebe in Uganda is described, illustrated and compared with S. cooperi Bernhauer, 1931. New data on the distribution of an additional 6 species are presented.

Ji L., Jäch M. A. 1998. Description of Eupotemus gen. nov. (Coleoptera: Epimetopidae) and world check list of the species of Epimetopidae. Entomol. Probl. 29 (2): 95-97.

Eupotemus gen. nov. (Coleoptera: Epimetopidae) is described. Eumetopus limicola Delève is designated as type species of Eupotemus. Georyssus carinaticollis Basilewsky is transferred to the new genus. The new genus is restricted to the Afrotropical Region. A world check list of Epimetopidae species is provided. Eupotemus limicola is recorded from Gabon for the first time.

Jäch M. A., Aguilera P. & Hernando C. 1998. New and little known Palearctic species of the genus Hydraena (s.l.) V (Coleoptera: Hydraenidae). Entomol. Probl. 29 (2): 99-105.

Two new species of Hydraenidae, Hydraena (s.str.) riberai and H. (s.str.) antiatlantica, are described from Morocco. The nomenclatoral-taxonomic problem concerning Hydraena africana Kuwert is discussed.

Hendrich L. & Balke M. 1998. A new species of Platambus Thomson (s.str.) from Northern Laos (Coleoptera: Dytiscidae). Entomol. Probl. 29 (2): 107-108.

Platambus strbai sp. nov. is described from Northern Laos. So far it is the only species of the genus known from this country. The species is well characterized by its small size, the colour of the elytra and the median lobe of the aedephagus.

Ribera I. & Millán A. 1998. Limnebius aguilerai sp.nov. from south Morocco (Coleoptera: Hydraenidae). Entomol. Probl. 29 (2): 109-110.

Limnebius aguilerai sp.nov. is described from Moroccan Atlas. The species belongs to the L. nitidus subgroup sensu Jäch, being most closely related to L. maurus Balfour-Browne, with an Ibero-north African distribution.

Schödl S. 1998. Taxonomic revision of Enochrus (Coleoptera: Hydrophilidae) I. The E. bicolor species complex. Entomol. Probl. 29 (2): 111-127.

The Enochrus bicolor complex of species (subg. Lumetus Zaitzev) is revised. Five species are known so far to occur in the Palearctic realm: Enochrus (Lumetus) bicolor (Fabricius), E. (L.) falcarius Hebauer, E. (L.) segmentinotatus (Kuwert), E. (L.) sinuatus d'Orchymont and E. (L.) turanicus (Turkmenistan, Iran), the latter being described as new. Lectotypes are designated for Philhydrus mediterraneus Sahlberg, Philhydrus mediterraneus var. transcaspicus Sahlberg, Philhydrus sahlbergi Kuwert, Philydrus apicinotus Kuwert, Philydrus atricornis Kuwert, Philydrus flavus Kuwert, Philydrus labiatus Rey, Philydrus maculiapex Kuwert, Philydrus segmentinotatus Kuwert, Philydrus sternospina Kuwert, Philydrus unguidebilis Kuwert and Philydrus vultur Kuwert. The following new synonyms are established: Enochrus bicolor (F.) (= E. yukinoae Matsui syn.nov.); E. segmentinotatus (Kuwert) (= Philydrus apicinotus Kuwert syn.nov. = Philydrus maculiapex Kuwert syn.nov. = Philydrus vultur Kuwert syn.nov. = Philhydrus mediterraneus var. transcaspicus Sahlberg syn.nov.). Distribution data are given, a key to the species is provided and morphological details are illustrated.

Zettel H. 1998. Four new species of Hydrotrephes (Heteroptera: Helotrephidae) from Thailand and Laos. Entomol. Probl. 29 (2): 129-137.

Four Hydrotrephes species, Hydrotrephes mirus sp.nov. (from Thailand: Mae Hong Son), H. schillhammeri sp.nov. (from Laos: Luang Nam Tha), H. septentrionalis sp.nov. (from Thailand: Mae Hong Son, Chiang Mai, Loei; Laos: Luang Nam Tha), and H. yupae sp.nov. (from Thailand: Lampang, Phetchabun, Chiang Mai) are described. A dimorphism of the cephalonotum of some Hydrotrephes species in connection with wing dimorphism is briefly discussed. The female subgenital plate of H. martini (Kirkaldy, 1904) is figured for the first time. Three species groups are defined.

Vít S. & Hlaváč P. 1998. Review of Euconnus (Tetramelus) of the reitteri group (Coleoptera: Scydmaenidae). Entomol. Probl. 29 (2): 139-147.

The lectotype is designated for Euconnus reitteri Saulcy, the lectotype of Euconnus kraussi Reitter is reviewed and the status of the species discussed. Complementary comments are made for the species E. colchicus Franz, E. marinae Franz and E. nachuzrischwilii Franz and a new compilatory key is provided.

Schimmel R. 1998. Neue und wenig bekannte Schnellkäfer aus Südostasien (Coleoptera: Elateridae). Entomol. Probl. 29 (2): 149-155.

Nine species of Elateridae from Yunnan, Vietnam, Nepal and Meghalaya (North-Eastern India) are described as new to science: Athous kubani sp.nov. (Yunnan), Athous weigeli sp.nov. (Nepal), Neoathousius hartmanni sp.nov. (Nepal), Parapenia sausai sp.nov., Penia foveolata sp.nov., P. jowaiensis sp.nov., P. necessa sp.nov., P. oblonga sp.nov. (Meghalaya) and Pectocera gibberosa sp.nov. (Vietnam). Furthermore, new records of P. horrida Schimmel & Platia, 1992, from Meghalaya are given.