46 ARTHROPODS 



(3) Draw specimen of pupa (Xi)- 



III. The Imago. — (i) Observe the general shape of the 

 body. Which animal studied is it most like? Compare it 

 with the cabbage butterfly in size and shape of abdomen, 

 wings and feet. Note carefully the color and markings on 

 wings and body. 



(2) Has it a distinct head? What parts are present? 

 Are the antennae segmented? Measure length of antennae 

 and compare with length of body. Note the position and size 

 of the eyes. Are they compound? In what way do they 

 differ from the eyes of the grasshopper? 



(3) Uncoil the proboscis and measure its length. How 

 does it compare with the length of the body? Is the pro- 

 boscis in one piece? Of what mouth parts do you suppose 

 it is composed? Let the proboscis recoil loosely. 



(4) Make drawings of dorsal view of entire animal 

 (Xi). Draw axes. 



Make the following drawings from microscopic views: — 

 The compound eye. 

 A side view of the proboscis. 

 A cross section of the proboscis. 

 Remove some of the covering from the thorax, from 



the abdomen and from the wings and draw each 



separately. 



(5) On the mesothorax find a pair of thin flaps ex- 

 tending back over the base of the first pair of wings. These 

 are the patagia, and are an extension of the front of the 

 mesothorax. Do you think they are useful ? 



Rub the scales ofif the wings so that the veins may be 

 seen. Study the veins closely and compare them with those 

 of the Anosia butterfly. 



