WATER BEETLES IN RELATION TO PONDFISH CULTURE. 
323 
Fig. 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. 
