The tomato red spider mite, Tetranychus evansi Baker and Pritchard, has been considered as a threat to tomato production in some countries. Limited efforts have been dedicated to search for this mite and its natural enemies in Argentina. The objective of this study was to further study the distribution of T. evansi and the occurrence of associated natural enemies of this mite in the northern part of that country. The survey was conducted in the provinces of Chaco, Corrientes, Entre Ríos, Santiago del Estero, Salta and Tucumán. A total of 1959 mites belonging to 57 species was found. Tetranychus evansi was found in the latter 5 provinces, which are located along the borders to Bolivia, Brazil, Paraguay and Uruguay. Euseius concordis (Chant) (Phytoseiidae) was the most abundant and frequent predator in this study; other predators were much less abundant and frequent. None of the predators found seem to be promising as a control agent of T. evansi. The pathogenic fungus Neozygites floridana Weiser and Muma (Entomophthorales: Neozygitaceae) was the most common natural enemy associated with T. evansi. It was found infecting T. evansi on tomato and eggplant. Further studies on the prospective use of this fungus for the control of T. evansi are warranted.

Four males of Amblyomma longirostre (Acari: Ixodidae) were collected on the rodent Coendou bicolor (Erethizontidae) at Área de Conservación Municipal Mishquiyacu Rumiyacu-Almendra (06°04′30.2″S, 76°58′33.5″W), Orquidiario Waqanki, Province of Moyabamba, Department of San Martín, Peru. This is the first Peruvian record of A. longirostre, which in South America has previously been reported from Argentina, Bolivia, Brazil, Colombia, French Guiana, Paraguay, Uruguay and Venezuela. Mammals and birds of various orders have been cited as hosts for adults of A. longirostre, but most records are from erethizontid rodents of the genera Coendou, Chaetomys and Sphiggurus. Birds appear to be the principal hosts for immature stages, although most records are from members of the order Passeriformes. Amblyomma longirostre appears not to be a threat to domestic vertebrates, from which it has seldom been reported, and its role as a vector of human rickettsioses is undetermined.

A number of bird species are known to be involved in the transmission cycles of at least two Borrelia species in Europe. Recent evidence suggests that the European blackbird (Turdus merula) and song thrush (T. philomelos) are the dominant hosts in these cycles. Examination of a suburban garden used as a winter roosting site for the European starling, Sturnus vulgaris, revealed an extremely high density of Ixodes ricinus nymphs and adults of up to ca. 50 ticks/m2, suggesting that this common, flocking avian species could also be of major epidemiological significance. Sampling of microhabitats showed that the ticks had not accumulated under the bamboo roosting site but had moved predominantly to open grassy areas. Both adults and nymphs were found to be infected with Borrelia valaisiana and/or Borrelia garinii.

Nothrolohmannia is a genus of oribatid mites that was previously recorded only from Papua New Guinea (PNG), from which two described species are known. Early classifications included this problematic genus in various oribatid mite superfamilies, but it was recently shown to be a sister-genus of Malacoangelia, a member of Hypochthoniidae. We describe the first species of Nothrolohmannia from outside PNG, based on two specimens from Samar Island, Philippines. Unlike the PNG species, it has notogastral porose organs similar to those of Malacoangelia, which solidifies the relationship of the two genera and shows that N. samarensis n. sp. is the most basal known member of Nothrolohmannia. Modifications to the generic diagnosis of Nothrolohmannia are proposed, to accommodate the new species.

Dorsipes balli spec. nov. (Acari: Podapolipidae), subelytral parasite of Carabus taedatus Fabricius (Coleoptera: Carabidae), is described from Western United States and Canada. Species in the dorsipes group have putative apomorphies for adult females (1) ambulacra I claws small, (2) coxae III setae 3a absent, (3) tarsi II solenidia omega absent, (4) setae v₁ reduced and the plesiomorphic character, two pairs of setae on plate EF. Dorsipes balli is compared with four species from Europe and Asia in the dorsipes group, all parasites of carabid beetles in the genus Carabus. Revised keys to groups and species of the group dorsipes are presented.

A new species, Eutarsopolipus steveni sp.n., from Chlaenius (Stenochlaenius) coeruleus (Steven, 1809) from Western Caucasus (Abkhasia) is described and compared with related species in the myzus group of Eutarsopolipus.

A new species of Neognathus Willmann (Acari: Caligonellidae), N. ueckermanni sp. nov., is described and illustrated from East Azarbaijan Province, Northwestern Iran.

Incorrect measurements of the dorsal body setae of four spider mites described as new in Ehara and Tho (1988) are corrected here. The species are Schizotetranychus kochummeni Ehara, S. approximatus Ehara, S. laevidorsatus Ehara and S. saitoi Ehara. In addition, the erroneous body size of S. saitoi described in the article is also corrected.

Epitrimerus torus sp. nov., from Acalypha reptans SN. (Euphorbiaceae) and E. angustisternalis sp. nov. from Bougainvillea spectabilis Willd. (Nyctaginaceae) are described and figured. Immature stages of the two new species and of seven other Eriophyoidea were studied and only in E. angustisternalis sp. nov. a reliable criterion distinguishing them was observed, but different from the one previously detected in Rhombacus eucalypti Ghosh & Chakrabarti.