Stadial distributions of Ommatoiulus Moreleti at different altitudes in Madeira with reference to life history phenomena (Diplopoda; Julidae)

Ommatoiulus moreleti is a julid millipede native of Spain and Portugal. It has been introduced into Australia, where it has become a considerable pest, and also into Madeira, where it is now reported to be the commonest species of millipede. In April and August 1981 an expediton from the University of Manchester Zoology Department visited Madeira and collections of the species were made in a variety of locations and habitats. The sex, instar and dimensions of each individual were later determined. The stadial distributions at different altitudes are given for April and August. A pattern is found with difference in altitude which varies between the times of the year studied. This variation is discussed with reference to the climate of different parts of the island.