24 Practical Zoology. 



and pull it about in all directions, to see how many joints the leg 

 has, and what motions are allowed by each joint. The segment 

 nearest to the body is the coxa. Then come, in order, trochanter, 

 femur, tibia, and tarsus (foot). 



13. What marks the line of division between the thorax and 

 abdomen ? 



14. Draw a ventral view on a large scale, showing especially the 

 parts of the legs, and the mouth parts. 



15. Watch a crawling beetle, to see in what order the legs are 

 moved. 



1 6. What can you lell of the habits of beetles? The different 

 kinds of beetles, and their development ? What is a grub ? Com- 

 pare beetles with other insects in strength. The large beetles are 

 good insects for dissecting, to show the internal structure. Beetles 

 belong to the order Coleoptera, or sheath-winged insects. 



Topics for Reports. Fireflies. Blister Beetles. The Carpet 

 Beetle. Water Scavenger Beetles. Whirligig Beetles. Carrion 

 Beetles. 



THE BUMBLEBEE. 



1. Find three simple eyes on the top of the head. How are 

 they arranged ? 



2. Describe the antennae. 



3. The mouth parts : 



a. A pair of true jaws. 



b. The long, hairy tongue. 



c. Above the tongue the two blades of the maxillae. 



d. Below the tongue two thin, narrow labial palps. 



The last three form a proboscis. Pick the parts asunder, and 

 make a drawing of the front of the head, showing all these parts. 



4. How does the bee take its food? Is the honey stored by 

 the bee the same as the nectar taken from the flower? 



5. Compare the segments of the legs with those of the grass- 

 hopper. How does the bee get pollen? What does the bee do 

 with the pollen? 



