This study was conducted in the years 1998, 1999 and 2003, and it is the first one on the Odonata fauna found in Gökçeada Island (northern Aegean Sea, Turkey). During the study period, 29 taxa were collected, or observed, and identified. One of the species observed on Gökçeada Island, Lindenia tetraphylla, is also found on the mainland of Turkey (Anatolian Peninsula, but only in five areas, Köyceğiz, Marmaris, Adıaman, Şanlıurfa and N of Hatay). As far as Aegean islands are concerned L. tetraphylla is found only in Island Thassos. Onychogomphus forcipatus albotibialis and Pantala flavescens, whose distribution range in the Aegean Islands is unclear, are other zoogeographically noteworthy records. Biogeographical data is congruent with island biogeography theory (MacArthur and Wilson, 2001).

Six new species of Laminiceps Costa from Argentina, Bolivia, Brazil, Paraguay, Peru, and Suriname are described. Laminiceps megaera (Burmeister) is redescribed, and new distributional records are given. A key to the known species belonging to the “megaera complex” is included.

The genus Dinica Gozmány, 1965 is recorded from Nanling National Nature Reserve, South China. Dinica rhombata sp. nov. is described and illustrated, the first record of this genus from China. The new species is very similar in appearance to Dinica endochrysa (Meyrick, 1935) from Japan, but it can be distinguished easily by the characteristics of the male genitalia: straighter aedeagus, larger subscaphium and slender saccus. Terminology of the male genitalia is briefly discussed.

Two new species are added to the genus Luteobalmus from South America, L. boulardi from French Guiana and L. hamatus from Colombia.

The adult stage is described for Traverella holzenthali Lugo-Ortiz and McCafferty and Traverella promifrons Lugo-Ortiz and McCafferty. Additional characters are given for recognition of the nymphs of these species.

The field life history of Steinovelia stagnalis (Burmeister) was studied in southern Illinois from 1983 through 1986. This species overwintered as adults, which became active in late March and were last collected in late October. Early instars (1sts–3rds) were found from early May to early September, and late instars (4ths–5ths) from late May to mid-September, but the occurrence of each instar was not continuous. The sequences of peaks of the five instars suggest that this species is bivoltine in southern Illinois. A survey of the biological literature is included.

A new species of Plochionocerus Dejean, 1833 is described, based on six specimens from Costa Rica, one from Venezuela and one from Ecuador. Dorsal habitus and diagnostic structures for its identification, as well as geographical and biological data, are provided.

This paper describes three new species in the obsoletus-group of genus Exallonyx Kieffer from China. These taxa are: E. densirugolosus sp. nov., E. inconditus sp. nov. and E. laevipropodeum sp. nov. All specimens are deposited in the Hymenopteran Collection of Zhejiang University, Hangzhou.

Eleven genera and fourteen species of Encyrtidae are recorded from Portugal for the first time. Four species: Cheiloneurus boldyrevi Trjapitzin et Agekian, Syrphophagus taeniatus (Förster), S. aeruginosus (Dalman) and Cerchysius subplanus (Dalman) are recorded for the first time from the Iberian Peninsula. Two new species, Pseudaphycus portugalensis sp. n. and Tetracnemoidea coimbrensis sp. n., are described. Distribution, synonyms and hosts for each new record are given.

A new Chinese stonefly species of the genus Rhopalopsole, R. baishanzuensis, in the family Leuctridae is described. Its diagnostic characteristics are discussed with the closely related congener R. sinensis.

Previously unknown female adult of Scopura jiri Jin and Bae in the wingless stonefly family Scopuridae is described from Korea with figures of key characters. The female adult of S. jiri can be distinguished from other congeners by the rudimentary projection in the posteromedial margin of the abdominal sternum VIII. S. jiri is distributed in the southernmost part in the Korean peninsula.

Description of female and male genital structures of Sitona fairmairei Allard, 1869 are given for the first time.

Ectatomma confine Mayr, 1870 is redescribed and illustrated. This is the first record of the species for Colombia and the first record since the original description.