Hydrachnellae 311 



protuberances. There are usually three or four pairs of genital suckers. 

 Swimming hairs may or may not be present on the legs. 



Axonopsinae Viets, 1929 



Genera and subgenera: 



1. Axonopsis Piersig, 1893 



a. Axonopsis s. str. 



Type. Hydrachna complanata Mliller, 1781 



b, Hexaxonopsis Viets, 1926 



Type. Axonopsis violacea Viets, 1911 



2. Axonopsalbia Viets, 1913 



a. Axonopsalbia s. str. 



Type. Axonopsalbia curvisetifera Viets, 1913 



b. Swnatralbia Viets, 1929 



Type. Sumatralbia nigosa Viets, 1929 



3. Axonopsella Lundblad, 1930 



a. Axonopsella s. str. 



Type. Axonopsella spinigera Lundblad, 1930 



b. Neoaxonopsella Lundblad, 1937 



Type. Axonopsella {N eoaxonopsella) trifida Lundblad, 1937 



c. Paraxonopsella Lundblad, 1937 



Type. Axonopsella {Paraxonopsella) filunguis Lundblad, 1937 



4. Barbaxona Viets, 1924 



Type. Barbaxona barbata Viets, 1924 • 



5. Brachypoda Lebert, 1879 



a. Brachypoda s. str. 



Type. Hydrachna versicolor Muller (= Brachypoda paradoxa Le- 

 bert, 1879) 



b. Hemibrachypoda Viets, 1937 



Type. Brachypodella mutila Walter, 1928 



c. Parabrachypoda Viets, 1929 (= Brachypodella Viets, 1926) 

 Type. Brachypoda montii Maglio, 1924 



6. Kalobrachypoda Viets, 1929 



Type. Kalobrachypoda rhopalopoda Viets, 1929 



7. Lethaxona Viets, 1932 



Type. Lethaxona pygmaea Viets, 1932 



8. LjaniaThoT, 1898 



Type. Ljania bipapillata Thor, 1898 



9. Miraxona Lundblad, 1936 



a. Miraxona s. str. 



Type. Miraxona clavipes Lundblad, 1936 



b. Miraxonella l.undh\3.d, 1936 



Type. Miraxona (Miraxonella) complicata Lundblad, 1936 



