The fauna of zerconid mites (Acari: Mesostigmata: Zerconidae) of the Nearctic region is comprehensively revised. All known 69 species grouped in 26 genera occurring in the Nearctic region are examined. Five new genera are proposed: Betaechinozercon gen. nov., Neoechinozercon gen. nov., Paramixozercon gen. nov., Rafaskas gen. nov., and Whartonas gen. nov. Twelve new species are described: Amerozercon briareus sp. nov., Bakeras evansi sp. nov., Microzercon yamoriae sp. nov., Paramixozercon alaskanus sp. nov., P. aoki sp. nov., Rafaskas blaszaki sp. nov., Zercon lucidus sp. nov., Z. manitous sp. nov., Z. morazae sp. nov., Z. raveni sp. nov., Z. oregonus sp. nov., and Z. skorackii sp. nov. The following new combinations are proposed: Blaszakiella mahunkai (Ujvári, 2013) comb. nov., B. pardus (Ujvári, 2013) comb. nov., Paramixozercon jasoniana (Díaz-Aguilar et Ujvári, 2010) comb. nov., P. albertanensis (Díaz-Aguilar et Ujvári, 2010) comb. nov., P. borealis (Díaz-Aguilar et Ujvári, 2010) comb. nov., Betaechinozercon americanus (Błaszak, 1982) comb. nov., Neoblaszakiella alaskaensis (Ujvári, 2013) comb. nov., N. luiseae (Ujvári, 2013) comb. nov., N. nudus (Ujvári, 2013) comb. nov., and Whartonas krantzi (Błaszak, 1980) comb. nov. The genera, Mixozercon Halašková, 1963 and Echinozercon Błaszak, 1976 are excluded from the list of the Nearctic zerconid genera. Keys to the zerconid genera and all Nearctic species are provided. Main aspects of the zoogeography of the family Zerconidae are discussed.

Three new species of eriophyid mites are described from silver fir Abies alba Mill. in Poland: Trisetacus monteabietus sp. nov. from family Phytoptidae, Cupacarus octogibbus sp. nov. and Tegonotus carpathicus sp. nov. from family Eriophyidae. Nalepella danica Boczek, Harding et Shi inhabiting A. alba, A. concolor (Gord. et Glend.) Lindl. ex Hildebr and A. lasiocarpa (Hook.) Nutt. has been recorded for the first time in Poland. All the plant species are new hosts for N. danica.

The oribatid mite genus Austrophthiracarus Balogh et Mahunka (Phthiracaridae) is recorded for the first time from China. Two new species of Austrophthiracarus are described: A. filiformis sp. nov. and A. longisetosus sp. nov. Their morphological descriptions and illustrations are given.

A new species, Caesarodispus shandizensis sp. nov. (Acari: Heterostigmatina: Microdispidae) associated with ants of the genus Temnothorax Mayr (Hymenoptera: Formicidae) from northeastern Iran is described. We also found Caesarodispus minutus (Sevastianov, 1981) associated with Temnothorax sp. These findings provide a new association between the mite genus Caesarodispus and ants of the genus Temnothorax. A key to world species of the genus Caesarodispus is provided and the host range of the mite genus is reviewed, showing that all ant hosts of the mite genus belong to the subfamily Myrmicinae (Hymenoptera: Formicidae).

This article provides new morphological and molecular data for Ogma aquitanense (Fies, 1968). This is the first report on the occurrence of this nematode in Poland and the second record in Europe. Our specimens correspond well with those from France described by Fies (1968), and Baujard and Luc (1985). Descriptions of partial sequences of 18S rDNA and 28S rDNA for O. aquitanense are also given.

Ten new species of the genus Laena Dejean, 1821 (Tenebrionidae: Lagriinae) are described from the Malayan Peninsula (L. benderaica sp. nov., L. jeraica sp. nov., L. kelantanica sp. nov., L. penangica sp. nov., L. tanahratica sp. nov.), Thailand (L. ellenae sp. nov.) and Laos (L. brancuccii sp. nov., L. geiseri sp. nov., L. kresli sp. nov., L. pacholatkoi sp. nov.). The aedeagus of L. champasaka is figured for the first time. Identification keys are added for the 18 species from Malaysia and for the 7 species from Laos; the species from Laos are mapped.

The subgenus Neopullus of Scymnus Kugelann, 1794 from China is herein revised. Eighteen species are documented from China, including four new species described here: Scymnus (Neopullus) nigroventralis Chen et Ren, S. (N.) brevicollis Chen et Ren, S. (N.) lulangicus Chen et Ren and S. (N.) quercanus Chen et Ren, spp. nov. Diagnoses, detailed descriptions, illustrations and distributions are provided for each species. A key to Chinese species is given.

Amphistethus biwenxuani sp. nov. from Xizang, China is described and illustrated. Key to the species of Amphistethus is updated, based on the key of Tomaszewska (2001).