General index of authors and name in volumes 11-20 (Second Series) La Redazione 131-177 PDF (Italiano)
On the morphology of the male genitalia fo some Bombus Latr. (Hymenoptera Bombidae) Graziella Bolchi Serini 1-15 PDF (Italiano)
Ethology, mandibular dimorphism in the larvae, and spinning of the cocoon in the subfam. Heterarthrinae (Hymenoptera Tenthredinidae) Giovanni M. Arru 17-36
Pollination of Ophrys (Orchidaceae) and pseudo-copulation of Hymenoptera males André Pouvreau, Remi Coutin, Charles Descoins 37-60 PDF (Français (Canada))
Phyllonorycter Hb. (Lepidoptera Gracillariidae) pests of Pomoideae and Prunoideae in ltaly Mario Ciampolini, Luciano Süss, Pasquale Trematerra 61-88 PDF (Italiano)
New Eurytomidae species chiefly parasites of legumes seed-eating beetles in Ivory Coast (Lamto) (Hymenoptera Chalcidoidea) Jean-Yves Rasplus 89-114 PDS (Français (Canada))
Influence of diet on the development of Lathridius anthracinus Mannerheim (Coleoptera Laihridiidae) Daria Patrizia Locatelli, Antonietta Galli 115-123 PDF (Italiano)
Tegolophus califraxini (Keifer) (Acarina Eriophyidae), a species of mite new for Europe Giuseppe Carlo Lozzia, Donatella Parma 127-129 PDF (Italiano)