Plate IV 



Hydrcena pennsylvanica Kiesenwetter 



Fig. 1. Labium, ventral view, first stage larva. 



Fig. 2. Right antenna, first stage larva. 



Fig. 3. Labium, dorsal view, first stage larva. 



Fig. 4. Labrum and clypeus, dorsal view, first stage larva. 



Fig. 5. Tip of right mandible, ventral view, first stage larva. 



Fig. 6. Tip of left mandible, ventral view, first stage larva. 



Fig. 7. Right mesothoracic leg, first stage larva. 



Fig. 8. Right mandible, first stage larva. 



Fig. 9. Egg-case, showing the single egg within. 



Fig. 10. Right maxilla, first stage larva. 



Fig. 11. First stage larva, dorsal view. 



