PLATE XIV. 

 [Proc. Wash. Acad. Sci., Vol. II, PL XXIII. ] 



Dytisciis 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 (X3S)- 



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



[382] (204) 



