PLATE XIV. 



[Proc. Wash. Acad. Sci., Vol. II, PI. XXIIL] 



Dytiscus dauricus Gebler. 



FIG. i. Dorsal view of larva (XI)- 



2. Under surface of the head (X6-5). 



Agabus tristis Aub6 



FIG. 3. Dorsal view of larva (X7-75). 

 4. Maxillae and labrum (X35)- 

 5- Mandible (X35)- 

 6. Ventral view of pupa (X7-75)- 



( 204 ) 



