BRITISH SPECIES OF DIPTEROUS GENUS FANNIA 133 



MYMARIN^. 

 Mymarini. 



1. Polynema ovidorum, L. Loch Libo, Clober, Bishopton, Manuel. 



2. P. albitarse, Kieffer. Mugdock. Mr H. St J. Donisthorpe informs 



me that he has this species from Rannoch, where it was 

 found in the nests of Formica rufa, the nests of which are 

 such conspicuous objects in the Black Wood of Rannoch. 

 Lagynodes pallidas, Boh., is another species of Proctotry- 

 pidce, which is a parasite, or, at least, a resident in the nests 

 of our big Red Ant. 



3. P. ruficolle, Kief. Thornhill, Dumfriesshire. 



4. P. longicauda. Kief. Ballantrae, Ayrshire. 



GONATOCERIN^. 



OOCTONINI. 



i. Ooctonus atroelavatuS) Kief. Clober. 



THE BRITISH SPECIES OF THE DIPTEROUS 

 GENUS FANNIA, Rob. Dsv. 



By J. R. Malloch. 



The want of reliable descriptions of species in English in 

 many families of insects is one of the principal reasons why 

 there are so few students of these families ; and even when 

 one understands German and French, it is not always easy to 

 obtain the books upon the group one is interested in. I 

 therefore purpose in the following pages to give a description 

 of the species in the genus Fanm'a, R. D., which is better 

 known as Homalomyia, Bouche. The generic name Fannia 

 has precedence over Homalomyia by four years, and is 

 adopted in the Katalog der Paldarktisclicn Dipteren, 1907. 

 However much one regrets a change of this nature, the rule 

 of priority must be regarded, and unless good and sufficient 



