Last update: 17 August, 2002
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A cosmopolitan species. Burla (1951), in his investigation of the Swiss fauna, found very few D. immigrans north of the Alps. He concluded that it was restricted to the Mediterranean region. On the other hand, Sobels et al. (1954) found it quite common in the Netherlands. The highest frequencies occurred in or near woodland and in gardens. I have taken D. immigrans in Britain mainly from gardens and other cultivated areas. Basden (1954a) found it only in fruit stores and banana warehouses in Edinburgh. It can be trapped from May until December although, like most Drosophila species, it is most plentiful in autumn.
Prof. B. Shorrocks
Bibliography
Basden, E.B. 1954a The
distribution and biology of Drosophilidae (Diptera)
in Scotland, including a new species of Drosophila. Transactions of the
Royal Society of Edinburgh 62, 602-654. Back
Burla, H. 1951 Systematik, Verbreitung und Oekologie der Drosophila Arten der Schweiz. Revue suisse de Zoologie 58, 23-175. Back
Sobels, F.H., Vlijm, L and Lever, J. 1954 The distribution of the genus Drosophila in the Netherlands. Archives Neerlandaises de Zoologie 10, 357û374. Back
