GEOGRAPHICAL DISTRIBUTION. 115 



The following list shows the distribution of the 11 genera within the 

 region, so far as I have been able to determine it by an examination 

 of the literature : 



Acletoxenus: England to Austria and Hungary. 



Aulacigaster : Scotland and Sweden to France, Italy, and Hungary. 



Camilla: Scotland and Sweden to Greece, Italy, and the Canaries. 



Chymomyza: Lapland to Siberia, Hungary, and Germany. 



Curtonoium : Southern France to Galicia and Italy. 



Drosophila: Canary and Faroe Islands to Egypt and Japan. 



Giiona: Germany and Austria to Tunis and the Canaries. 



Leucophenga: England and Sweden to Hungary, Italy, and France. 



Mycodrosophila: Hungary to southern Russia. 



Scaptomyza: Canary and Faroe Islands to Egypt and Austria. 



Stegayia: Sweden and England to France, Hungary, and western Russia. 



Most of Europe has been thoroughly collected, and the Canary 

 Islands and Madeira are known from Becker's papers. The rest of 

 the region is unknown except for a few scattering records. 



ETHIOPIAN REGION. 



The genus Dettopsomyia is endemic. There are probably one or 

 two endemic genera among the species described as Drosophilae by 

 Lamb, as that author has pointed out. The region is, so far as known, 

 characterized by the absence of the genus Scaptoinyza. Of the 43 

 species here recognized, 39 are endemic. The other 4 {Drosophila 

 busckii, D. funehris, D. melanogaster, and D. repleta) are cosmopolitan. 

 The fifth species that is here considered as cosmopolitan, D. immigrans, 

 has not yet been recognized from the Ethiopian region, but may be 

 expected. 



The 9 Ethiopian genera have the following recorded distribution 

 within the region: 



Camilla: Kongo. 



Chymomyza: Seychelles. 



Curtonoium: Senegal and Cameroon to Cape Colony. 



Dettopsomyia : Seychelles . 



Drosophila: Eritrea to Ashantee, Rhodesia, Mauritius, and Seychelles. 



Leucophenga: Cameroon, Rhodesia, Seychelles. 



Mycodrosophila: Seychelles. 



Siegana: Kongo. 



Zaprionus: Senegal to Eritrea, Rhodesia, and the Seychelles. 



Lamb has given a full and valuable account of the fauna of the 

 Seychelles. Kahl has presented some data on a few species from 

 Cameroon, and Adams has described a few species from Rhodesia. 

 Aside from these the region is known only from a few scattered refer- 

 ences. It must certainly contain a large number of undescribed 



species. 



ORIENTAL REGION. 



The genus Apsinota and the doubtfully valid genus Thaumastophila 

 are endemic in the Oriental region. So far as the published descrip- 

 tions and the specimens that I have seen show, the genus Chymomyza 



