Kettle holes are very characteristic elements of the landscape of the Kujawy. In 21 localities all together 26 species of caddis flies were collected. Two of them (Ylodes conspersus and Limnephilus auricula) are new for ...

Based on author’s own studies and information on the all collections fenology of the adult stages appearance of bag moths (Lepidoptera, Psychidae) in Poland is given.

Hyleus lepidulus Cockerell and Eucera pollinosa Smith (= E. polonica Ruszkowski, syn. nov.) are recorded for the first time from Poland. New records of further 5 rare species are given.

Results of the investigations of toxicity properties of some social Aculeata venoms were presented. The action of crude venoms of six aculeate species: Apis mellifera, Bomhus sp., Vespa crabro, Vespula germanica, Vespula ...

In the present paper some information on the potencial of the epidemiology hazard produced by community of hornet Vespa crabro is given. In nests of hornet recorded in Łódź, 24 species of pathogenic and conditional ...

Preliminary results of investigation on the distribution of nests of the hornet within the area of Łódź in 1998 and 1999 are given. 25 nests in 1998 and only 8 nests in 1999 was found (8 8% of nests was found in buildings).