COMMA 2012, Vienna " The science of Dialectic, in one sense of the word, is mainly concerned to tabulate and analyse dishonest stratagems " Arthur Schopenhauer, The Art of Controversy (1896)

Tanaostigmodes horacioi sp. nov. Perioto & Lara (Hymenoptera, Tanaostigmatidae) from Brazil is described and illustrated. T. horacioi is the second included species in the insculptus species group of Tanaostigmodes Ashmead, 1896. A key to species of the insculptus group is provided.

1 Problem In 1896, Birkeland reported [1, 2, 3, 4] studies of a Crookes tube when a strong, straight electromagnet was placed outside and to the left, as in the figures below.