Studies on the related Neotropical genera Acrogymnia Malaise and Dacrogymnia, n. gen. (Hymenoptera: Argidae).

Twenty species of Acrogymnia Malaise and five species of Dacrogymnia Smith Malagón-Aldana, n. gen., both exclusively Neotropical genera, are treated.

The sawflies and woodwasps (Hymenoptera: 'Symphyta') of Colombia.

A survey of the 'Symphyta' of Colombia is conducted, based on information from literature as well as on examination of over 2,000 specimens from the major Colombian entomological collections. A total of 127 species are recorded from Colombia, representing six families: Argidae (48 species), Tenthredinidae (37) Pergidae (37), Xiphydriidae (3 species), Siricidae (1 species) and Orussidae (1 species). 11 genera and 68 species are new records for Colombia, doubling the number of previously reported species.