Budowa mózgu muchówek z rodziny Tabanidae

The paper deals with the histological structure of the brain in the specimens of the Tabanidae family including Tabanus, Chrysops and Chrysosona genera. Measurements of the brain volume and of the brain cen tres were made and the ratio of the size of the centres to that of the brain was given on the example of the female of Tabanus bromius. Lobi olfactorii are the best developed brain centres in Tabanidae. They take up 88.53% of the whole brain in the female of Tabanus bromius. Corpora pedunculata are poorly developed (0.14%) and built up of single, small calyces and thin stalks. The central body is well developed and consists of three parts. The central body takes up 0.15% of the size of the brain in the female of Tabanus bromius. Although lobi olfactorii are small when compared with the size of the brain (0.29%), the size of the antennal glomerules and thick fibres of the antenno-globular tracts are an evidence of a well developed sense of smell in those parasites.