New species and new records of Cosmolaelaps Berlese (Acari: Laelapidae) from Russia, with a review of the Russian species of the genus.

This paper reports on six species of the genus Cosmolaelaps (Laelapidae) in Russia: Cosmolaelaps lutegiensis (Shcherbak) collected from soil-litter, C. chianensis (Gu) and C. rectangularis Sheals, 1962 from Myrmica sp. (Formicidae), and Cosmolaelaps lasiophilus Joharchi sp. nov., Cosmolaelaps latisetis Joharchi sp. nov., and Cosmolaelaps sejongi Keum et al. from Lasius spp. (Formicidae). Two new species are described and illustrated from adult females and supplementary descriptions of three other species are presented to facilitate species delimitation. In addition, an identification key to all known Russian species of the genus is presented.

Review of some mites of the genus Ololaelaps Berlese (Acari, Laelapidae) in Russia, with description of a new species.

This study provides additional morphological information and new illustrations for three species of Ololaelaps Berlese described by Bregetova Koroleva (1964) from RussiaO. caucasicus, O. sellnicki and O. ussuriensisto supplement the original descriptions. Since holotypes for these three species were not designated, a lectotype is chosen from among the syntypes of each examined species. We describe the adult male and female of Ololaelaps altaiensis Joharchi sp. nov., from specimens collected from moss on the shore of the Teletskoye Lake, in Altai Mountains, Russia. The new species is distinguished from other Ololaelaps species by its short peritremes, ending near the middle of coxae II. The new species also has elongate paradactyli, extending well beyond the pretarsal claws; this feature appears to be correlated with the species semiaquatic habitat, and such correlation between tarsal morphology and ecology occurs in other species of Ololaelaps and of Gaeolaelaps with similar habitats.

Some free-living laelapid mites (Acari: Mesostigmata: Laelapidae) from Tristan da Cunha and Nightingale Islands, with description of a new species of Gaeolaelaps Evans amp; Till (Acari: Laelapidae) and the first afrotropical record of the genus Nidilaelaps Shaw.

This paper reports on four species of free-living mites of the family Laelapidae from Tristan da Cunha and Nightingale Islands: Cosmolaelaps claviger (Berlese), Gaeolaelaps aculeifer (Canestrini), G. furcatus sp. nov., and Nidilaelaps annectans (Womersley). The new species has the unique character states of the paradactyli on pretarsi IIIV being very elongated and the pulvillar lobe well developed in shape of a fork on ambulacra IIIV. The genus Nidilaelaps Shaw is here reported for the first time from Afrotropical realm.

A new species of the genus Proctogastrolaelaps McGraw amp; Farrier (Acari: Melicharidae) from the Far East of Russia, and contributions to knowledge of this genus.

We describe a new mite species from the Far East of RussiaProctogastrolaelaps subsolanus Joharchi Marchenko sp. nov. (Acari: Melicharidae). The new species was collected from soil-litter on the shores of the Tunaycha Lake and Sea of Okhotsk in Sakhalin Island. The important morphological characteristics of the genus Proctogastrolaelaps are revised.