PLATE XIV. 



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

 Dytiscus dauricus Gebler. 



Fig. i. Dorsal view of larva (Xf )• 



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



Agabus trtstis Aub6 



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



4. Maxillae and labrum (X35)- 



5. Mandible (X35)- 



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



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