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A small collection of Psocoptera from the northern district „Chubsugul-Aimak” of Mongolia is examined. Ptycta chubsugulensis sp. n. is described as new to science. Trichadenotecnum germanicum Roesler is mentioned for the first time from Mongolia and Amphigerontia contaminata (Stephens) from Chubsugul-Aimak.

Die Gattungen der Familie Tridactylidae BRUNNER, 1882 werden kurz revidiert. Zur Familie gehoren 7 Gattungen, von denen eine, Bruntridactylus gen. n., neu beschrieben wird. Sie werden zwei Unterfamilien, Tridactylinae subfam. n. und Dentridactylinae subfam. n., zugeordnet. Es wird ein illustrierter Schlussel fur die Bestimmung der Tridactylidae-Gattungen gegeben und eine Klassifikation der Unterordnung Tridactylodea vorgelegt. Diese Unterordnung umfast 3 Familien, 11 Gattungen und 157 Arten. The genera of the family Tridactylidae BRUNNER, 1882 are revised shortly. To the family belong 7 genera, one of which, Bruntridactylus gen. n., is described as new. They are divided to two subfamilies, Tridactylinae subfam. n. and Dentridactylinae subfam. n. An illustrated key for the determination of the Tridactylidaegenera is given and a classification of the subordo Tridactylodea proposed. The Tridactylodea includes three families, 11 genera and 157 species.

A new genus, Afrotridactylus gen. n., of the family Tridactylidae (Insecta, Orthoptera) is established. 7 species belong to this taxon, 3 of which (A. koenigsmanni sp. n., A. meridianus sp. n., A. spiralatus sp. n.) and the subspecies A. usambaricus alter ssp. n. are described as new to science. The hitherto known species are redescribed and illustrated. Tridactylus flavidorsum Chopard, 1938 is found a new younger synonym of Afrotridactylus ghesquierei (Chopard, 1934). Keys are given for the determination of the genera of Tridactylidae and the species of the genus Afrotridactylus, gen. n. The new genus is distributed in the ethiopian region only.

The Tridactyloidea of Colombia are revised. Diagnoses and illustrations of all taxa are given. Keys for determination are included. All reliable records of distribution are mentioned. Important news to biology and ecology are inclosed. Mirhipipteryx schuchmanni sp. n., Mirhipipteryx lineata anchicayensis ssp. n. and Ellipes peruvianus macarenensis ssp. n. are described new to science. Neotridactylus australis (Bruner), N. occultus Gunther and Ripipteryx nodicornis Hebard are recorded for the first time from Colombia.

The genus Bruntridactylus Gunther, 1979 is revised, eleven species now being included. Supplementary redescriptions are given of the hitherto known six species. Lectotypes of Br. apicedentatus (Chopard), Br. irremipes (Uvarov), and Br. saussurei (Chopard) are designated. Five species (Br. blackithi sp. n., Br. centralafricanus sp. n., Br. hannemanni sp. n., Br. latihamatus sp. n., and Br. mocambicus sp. n.) are described as new to science. Keys to the genera of the family Tridactylidae and to the species of Bruntridactylus are given. The degree of relationship between the species is demonstrated by a dendrogram. In connection with the revision the designation of a neotype of Tridactylus paradoxus Latreille, 1802 was necessary.

The species of the genus Xya Latreille from the Mediterranean Region are revised. Four species are ascertained. A lectotype of Xya variegata Latreille, 1809 is designated. Two new species, Xya iberica sp. n. and Xya harzi sp. n. are described. Xya indistincta (Harz, 1979) is conspecific with Xya pfaendleri (Harz, 1970). An illustrated key for the determination is given.

The syntypes of Coniopteryx pygmaea Enderlein, 1906, preserved in the collection of the Zoological Museum Berlin, are studied. A lectotype (♂) is designated; locus typicus: Berlin-Rahnsdorf, Germany. Coniopteryx parthenia (Navas & Marcet, 1910) is a younger synonym of Coniopteryx pygmaea Enderlein. Coniopteryx pygmaea: Meinander, 1972 is synonym with Coniopteryx hoelzeli Aspock, 1964.

The Tridactyloidea of Southern Africa (Orthoptera, Caelifera The African Tridactyloidea, especially from the southern parts of this continent (Madagascar included), are studied and revised with taxonomical and faunistical point of view. 41 species are found out. They belong to 6 genera: Tridactylus (3), Asiotridactylusgen. n. (2), Afrotridactylus (7), Xya (23), Paratridactylus (1) and Bruntridactylus (5). The genus Asiotridactylusgen. n., 11 species (Tridactylus angustussp. n., Asiotridactylus aethiopicussp. n., Bruntridactylus katangensissp. n., Xya albiantennatasp. n., albigenatasp. n., X. atrasp. n., X. aurantipessp. n., X. pronotovirgatasp. n., X. elytromaculatasp. n., X. tumbaensissp. n., X. uamensissp. n., X. univenatasp. n.) and a subspecies (Xya capensis albilobatassp. n.) are described new to science. Diagnoses with illustrations and keys for the determination of all african species are included. Supplementary redescriptions are added to several species hitherto known incompletely. Southern to the 15th degree of latitude S are recorded 4 genera and 16 species only: Tridactylus (2), Afrotridactylus (4), Xya (9) and Bruntridactylus (1). Many contributions to the distribution of the species are given.

Important contributions to the distribution of 53 species of the families Tridactylidae and Ripipterygidae are given. 7 species (Neotridactylus pentacuminatus sp. n., Ellipes elytrosignatus sp. n., Ripipteryx paraprocessata sp. n., Mirhipipteryx disparilobata sp. n., M. imperfecta sp. n., M. lineata sp. n., M. unispinosa sp. n.) and 2 subspecies of Mirhipipteryx biloba (Hebard) (M. b. aberrans ssp. n., M. b. incurvata ssp. n.) are described as new to science. The females of Ripipteryx lawrencei Gunther and Ripipteryx crassicornis Gunther are mentioned here for the first time. Now 105 species of the Tridactyloidea are known from the Neotropis (Ripipterygidae: 66, Tridactylidae: 38, Cylindrachetidae: 1).

The family Cylindrachetidae Giglio-Tos, 1914 is revised. Supplementary redescriptions are given to all hitherto known two genera (Cylindracheta Kirby, 1906 and Cylindroryctes Tindale, 1928) and six species. The genus Cylindraustraliagen. n. and ten species of this taxon (C. acutasp. n., C. centricolasp. n., C. cookensissp. n., C. divisasp. n., C. granulatasp. n., C. karumbensissp. n., C. parakochiasp. n., C. parvitarsatasp. n., C. setosasp. n., C. tindaleisp. n.) are described as new to science. A lectotype of Cylindroryctes spegazzinii (Giglio-Tos, 1914) is designated. Now 3 genera and 16 species belong to this family. Cylindracheta psammophila Tindale, 1928 is a younger synonym of Cylindraustralia kochii (Saussure, 1877). Keys to the genera and species are included. The geographical distribution and the relationship of the taxa is discussed.

Dorypteryx domestica SMITHERS has been discovered at the first time on the territories of the Federal Republic of Germany and the German Democratic Republic. A description of this species, illustrations, and contributions to the biology and distribution are given.

Dentridactylus raggel sp. n. from South Africa is described, illustrations are given. Dentridactylus denticulatus (SAUSSURE) seems to be the next related species to it.