Gallophilous theory of cyclical parthenogenesis in aphids (Homoptera, Aphidinea).

The paper elaborates theoretical basis of the origin of aphid cyclical parthenogenesis in view of the original life of these insects in strobiloid galls on spp. The period of gall opening is greatly extended in time, which prevents normal panmixia and creates a selective advantage for parthenogenetic reproduction. Migration of aphids to secondary host plants, on which closed galls never form, parthenogenetic reproduction on these plants, and the subsequent simultaneous return of "remigrants" to the main host plant make it possible to synchronize the development of the bisexual generation and achieve mass panmixia at the end of the life cycle only; it coincides with the end of summer growth shoots or the autumn end of the vegetation period as a whole.

The ectoparasitoid wasp (Marshall, 1888) (Hymenoptera, Braconidae, Doryctinae) as a natural enemy of Fairmaire, 1875 (Coleoptera, Ptinidae) in Italy.

(Marshall, 1888) is redescribed and illustrated based on the holotype of Marshall, 1888 and on recently collected material from its type locality (Sicily, Italy). Previous host records for this species are unreliable. Here, the host of , the rare ptinid beetle Fairmaire, 1875, is recorded for the first time, having been reared in a historic library in Palermo, Italy.

Checklist of hosts, illustrated geographical range, and ecology of tick species from the genus (Acari, Ixodidae) in Russia and other post-Soviet countries.

Hard ticks (Acari: Ixodidae) are the economically and ecologically most important blood-sucking arthropod vectors that can transmit disease agents under temperate climate. In this group, the highest number of species (currently nearing 270) belongs to the genus . For this review, more than 400 papers related to this genus in the context of Russia were checked for data on the host records, locations of collection, as well as ecology of assigned tick species.

Molecular and morphological evidence reveals hidden new taxa in (Bremer, 1861) (Lepidoptera, Hesperiidae, Hesperiinae) from China.

Two new species of Scudder, 1872, Zhu, Fan & Wang, and Zhu, Fan & Chiba, , are found in China and described, and (Butler, 1878) is restored. A lectotype is designated for Bremer, 1861, and a neotype is designated for Butler, 1878. Overall, the two new species are similar to (Bremer, 1861).

A new species of (Lepidoptera, Gracillariidae) feeding on (Fabaceae) in southern Siberia and its hymenopterous parasitoids.

A new species of leaf-mining moth described here as Kirichenko, Akulov & Triberti, was detected in large numbers feeding on (Fabaceae) in the Republic of Khakassia (Russia) in 2020. A morphological diagnosis of adults, bionomics and DNA barcoding data of the new species are provided. The developmental stages (larva, pupa, adult), male and female genitalia, as well as the leaf mines and the infestation plot in Khakassia are illustrated; the pest status of the new species in the studied region is discussed.

Chromosomal and DNA barcode analysis of the Staudinger, 1881 species complex (Lepidoptera, Nymphalidae).

The species of the Staudinger, 1881 complex are distributed in Central Asia. Here we show that this complex is a monophyletic group including the species, , Sheljuzhko, 1929 and Fruhstorfer, 1917. The haploid chromosome number n=29 is found in and and is, most likely, a symplesiomorphy of the complex.

Geometridae (Lepidoptera) of the Baikal region: keys to species and an annotated catalogue. Part 1. Ennominae.

The dichotomous keys to 106 species from 62 genera of Ennominae (Lepidoptera: Geometridae) of the Baikal region (Irkutskaya Oblast and Buryatia, Russia) is given. The annotated catalogue including synonyms, the details of examined specimens, data on distribution and hostplants with references is provided. Distribution of Macaria artesiaria ([Denis et Schiffermüller], 1775) in the Baikal region is confirmed.

Chromosomal and DNA barcode analysis of the () (Eversmann, 1841) species complex (Lepidoptera, Lycaenidae).

The Polyommatus (Agrodiaetus) damone (Eversmann, 1841) species complex comprises from 5 to 8 species distributed in southeastern Europe and southern Siberia. Here we used chromosomal and DNA-barcode markers in order to test the taxonomic hypotheses previously suggested for this complex. We revealed that all taxa within this group demonstrate chromosomal stasis and share the same or very similar haploid chromosome number (n = 66 or n = 67).

A review of the genus Anelastes Kirby, 1819 (Coleoptera: Eucnemidae) of the Palaearctic fauna.

The genus Anelastes Kirby, 1819 of the Palaearctic fauna is revised. An amended diagnosis of the genus is elaborated. Two new species from North Africa, Anelastes abbreviatus sp.

Drilorhinus, a new genus of the family Drilidae Lacordaire, 1857 (Coleoptera: Elateroidea) from Iran.

A new genus of the family Drilidae, Drilorhinus gen. nov. with one new species D.

Acari of Canada.

Summaries of taxonomic knowledge are provided for all acarine groups in Canada, accompanied by references to relevant publications, changes in classification at the family level since 1979, and notes on biology relevant to estimating their diversity. Nearly 3000 described species from 269 families are recorded in the country, representing a 56% increase from the 1917 species reported by Lindquist et al. (1979).

Two types of highly ordered micro- and macrochromosome arrangement in metaphase plates of butterflies (Lepidoptera).

In karyotype of many organisms, chromosomes form two distinct size groups: macrochromosomes and microchromosomes. During cell divisions, the position of the macro- and microchromosomes is often ordered within metaphase plate. In many reptiles, amphibians, birds, insects of the orthopteran family Tettigoniidae and in some plants, a so called "reptilian" type organization is found, with microchromosomes situated in the center of metaphase plate and with macrochromosomes situated at the periphery.