A new braconid wasp from the Upper Cretaceous (Cenomanian) amber of the Hukawng Valley in Kachin State, Myanmar is described and figured from a unique female. Seneciobracon novalatus Engel & Huang, gen. et sp. n., is placed in a distinct subfamily, Seneciobraconinae Engel & Huang, subfam. n., owing to the presence of a unique combination of primitive protorhyssaline-like traits, with an otherwi...

1School of Natural Sciences, Division of Psychology, University of Stirling, Stirling, FK9 4LA, Scotland 2CAPP: Centro de Administracao e Politicas Publicas and Instituto Superior de Ciencias Sociais e Políticas da Universidade Tecnica de Lisboa, Rua Almerindo Lessa, Polo Universitario do Alto da Ajuda, 1349-055 Lisboa, Portugal 3CRIA Centre for the Research in Anthropology and Departament of A...

Engel groups and Engel elements became popular in 50s. We consider in the paper the more general nil-groups and nil-elements in groups. All these notions are related to nilpotent groups and nilpo-tent radicals in groups. These notions generate problems which are parallel to Burnside problems for periodic groups. The first three theorems of the paper are devoted to nil-groups and Engel groups, w...

Osteomyelitis of the maxilla is a rare condition, about eighty cases having been reported since 1847. It produces a characteristic clinical picture, making recognition easy. Asherson (1939) in England and Lacy and Engel (1939) in the U.S.A. have given detailed accounts of the clinical picture and the differential diagnosis and have discussed the etiology and reviewed the literature. Their views...