32 ANIMAL BIOLOGY 



6. Examine the wings and state 



a. Their number, and the region of the body to which 



they are attached. 



b. Their characteristics of texture. 



c. Their adaptations for flying. 



7. Is the abdomen segmented or not ? 



B, Food-getting organs. 



1. If the mouth parts do not project from the lower pan 



of the head, you should find them bent back- 

 ward beneath the head and thorax. Use the 

 dissecting needle to straighten them out. 

 Carefully separate these mouth parts and count 

 them. 



a. How many mouth parts do you find ? 



b. Describe the general shape of all these parts. 



c. How are the mouth parts fitted to enable the bee 



to get nectar from flowers? 



2. (Optional.) Spread the mouth parts on some white blotting 



paper and stick pins into the blotting paper so as to 

 keep the parts from coming together. Use the magni- 

 fier to distinguish the following parts : 



a. The central, longest part, the tongue. (It has hairs on 



its surface.) The tongue springs from a broader 

 body, the lower lip. 



b. Two shorter parts on either side of the tongue, springing 



also from the lower lip, and called labial palps be- 

 cause they are believed to correspond to the jointed 

 bodies of that name attached to the lower lip of the 

 grasshopper and other insects. (See 20, B, 7.) 



c. Two broader parts springing from a point farther back 



than the labial palps and supposed to correspond to 

 the helping jaws of the grasshopper, and hence called 

 maxillcB. (See 20, B, 8.) 



Draw a front view of the outline of the head and of these 

 five mouth parts ( X 4). Label each part. 



