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. Acrogymnia occurs from Costa Rica south to Bolivia and southeastern Brazil and Dacrogymnia from southern Colombia to Argentina. The following species are included: Acrogymnia alagoas Smith, n. sp., A. blanki Smith, n. sp., A. brevis Smith, n. sp., A. chapada Smith, n. sp., A. clypea Smith, n. sp., A coxalis (Konow, 1906), A. deulufeuti Smith, n. sp., A. diamantinensis Malaise, 1955, A. fascia Smith, n. sp., A. krylita Smith, n. sp., A. listoni Smith, n. sp., A. lopesi Malaise, 1949, A. palama Smith, 1992, A. pauxilla (Konow, 1906), A. pereirai Smith Malagón-Aldana, n. sp., A. pulla Smith, n. sp., A. pusilla (Malaise, 1937), A. rufina Malaise,1949, A. scutimacula Malaise, 1941, A. transtillata (Konow, 1906), Dacrogymnia acella (Smith, 1992), n. comb., D. imbogea (Smith,1981), n. comb., D. australis Smith, n. sp., D. fernandezi Smith Malagón-Aldana, n. sp., and D. taegeri Smith, n. sp. An identification key for species is provided; however, association of sexes in Acrogymnia is still uncertain for several species.

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. Heteroperreyia (Pergidae) is recorded for the first time in northern South America. Most records and species are concentrated in the Andean region. Four new species are described: Acrogymnidia catalina Malagón-Aldana, sp. nov., Ptenos amazonicus Malagón-Aldana, sp. nov. (Argidae), Heteroperreyia andina Malagón-Aldana, sp. nov. (Pergidae) and Derecyrta risaraldensis Malagón-Aldana, sp. nov. (Xiphydriidae). The following taxonomic changes are proposed, and lectotypes designated for all these nominal taxa: Dochmioglene suppar (Konow, 1903), comb. n., Plaumanniana parmata (Konow, 1903), comb. n., and Proselandria analis (Fabricius, 1804), comb. n.; Plaumanniana biclinia (Konow, 1899) = Stromboceros marcidus Konow, 1899, syn. n.; Proselandria analis (Fabricius, 1804) = Stromboceros brevispinis Konow, 1908, syn. n., Monophadnus trichiotomus Cameron, 1911, syn. n. and Romaniola amazonica Forsius, 1925, syn. n.