TYPICAL INSECTS 



191 



The lower lip (second pair of maxillae) is generally folded 

 like a mask over the lower part of the face, but it can be 

 suddenly shot out to seize mosquito "wrigglers" and other 



±. Whiiling-beetle. 



z. Diving--beetre. 



3. Mosquito Wriijglers. 



4. Water-strider. 



Fig. 50. Some Aquatic Insects. 



5. Back-swimmer. 



6. " Electric-light " Bug-. 



7. Long-bodied Water-scorpion. 



8. Short Water-scorpion, 



9. Water Scavenger-beetle. 



10. Water Boatman. 



11. Caddis-worm. 



12. Dragon-fly Larva. 



13, Larva of Water-scavenger, Water-tiger. 



aquatic creatures. With a pin or forceps, pull out the lip 

 and examine it. 



During its growth the young dragon-fly moults several 

 times. When about ready for the final moult, the insect crawls 

 out of the water upon the shore or on some projecting plant, 

 then splits its nymph skin along the back, and emerges 



