WATER BEETLES IN RELATION TO PONDFISH CULTURE. 



317 



Fig. 120.— Dorsal view of larva of Enochrus nebulosus. Fig. 121.— Head of larva of E. diffusus. Fig. 122.— Maxilla of nebulosus. 

 Fig. 123.— Maxilla of diffusus. Fig. 124.— Right mandible of diffusus. Fig. 125.— Left mandible. Fig. 126.— Ventral view 

 of pupa of nebulosus. Fig. 127.— Mandible of adult beetle, nebulosus, dorsal view. 



