WATER BEETLES TN RELATION TO PONDFISH CULTURE. 



323 



Pig. 128.— Egg of Tropisternus lateralis. Fig. 129.— Dorsal view of larva of same. Fig, 130.— Head enlarged, showing color 

 pattern. Fig. 131.— Side view of posterior end of abdomen. Fig. 132.— Dorsal view of same. Fig. 133.— Antenna. Fig. 

 134.— Mandible. Fig. 135.— Maxilla. Fig. 136.— Labium, ventral view. 



