92 ELEMENTARY LESSONS ON INSECTS 



two claws and a remarkably developed sucking pul- 

 villus. 

 7. The absence of wings. 



II. The Ant-lion. 



With an adult ant-lion fly in hand, note: 



1. The club-shaped antennae. 



2. The sharp-toothed, rapacious jaws. 



3. The long, elegant, gauzy wings. 



4. The spiny legs. 



With a larva in hand, note: 



1. The humpbacked body, narrowed forward to the neck. 



2. The pointed rear end, clad with stiff hairs that point 

 forward. 



3. The forward slant of the spiny legs. All these things 

 facilitate moving backward in the sand. 



4. The huge forceps-like jaws, similar to those of the 

 aphis lion, but larger and toothed inside for holding 

 larger, struggling captives. 



III. TheOrl Fly. 



With an adult in hand, note: 



1. The broad, smoky wings and dusky body. 



2. The long antennae. 



3. The biting mouthparts. 



4. The depressed thorax. 



5. The slender legs with 5-jointed tarsi. 



