Figs 182-184 Larva of Gonielmis dietviahi: 182- dorsal 

 aspect; 183- ventral aspect; 184- lateral aspect. 



^M i^--^ ms-r 



iL 



Figs 185-188 Larva of Heterlirmius corpulentus : 185- dorsal 

 aspect; 186- ventral aspect. Larva of Oulimnius latius cuius : 

 187- dorsal aspect; 188- ventral aspect. 



33 (1) Ninth abdominal segment with a ventral operculum 



closing a caudal chamber containing 3 tufts of re- 

 tractile filamentous gills; without gills on other 

 parts of abdomen; expanded lateral portions of 



abdominal segments separated EUBRIINAE 



Ninth abdominal segment without ventral operculum; with 

 pairs of ventral tufts of filamentous gills on 4 or 5 

 abdominal segments; expanded lateral portions of ab- 

 dominal segments fitting tightly together at margin... 



34 



36 



65 



