60 ANIMAL ACTIVITIES. 
(g) A foot highly magnified, showing the two claws 
at the end of the last segment and the sucking-disks 
by which the fly walks on a ceiling. 
(2) The proboscis as seen with the microscope. 
The Colorado Beetle. This beetle is often called 
the potato-bug or potato-beetle. Its destructive ravages 
are well known. A visit to a potato-field anywhere 
while the plants are growing will commonly provide 
the collector with an abundance of specimens in all 
stages of growth from the egg to the adult. Look for 
eggs on the under side of a leaf. The pupa stage is 
spent underground, and specimens are more difficult 
to find. Keep in formalin. 
Examine a living beetle. 
Notice how it eats, how it walks, and how it flies. 
See if you can make out how its wings are folded. 
How does the folding compare with the folding of 
the wings of a grasshopper ? 
Notice the eggs and the various stages of growth. 
How many segments has the beetle’s abdomen ? 
Of how many segments is each foot composed ? 
Examine a dead specimen with care and write resem- 
blances and differences for beetle and grasshopper. 
The Dragon-fly. Near fresh-water ponds and streams 
adult dragon-flies may be easily caught. The larve 
are usually plentiful where decaying leaves furnish 
food for the small animals on which they live. The 
imago may be mounted like a butterfly and then ex- 
amined. 
How many wings? 
Are the wings ‘folded ? 
Are the wings alike ? 
How does the veining compare with that of a fly’s 
wing? 
Is the head easily movable ? 
How does it compare with the other insects you have 
studied in regard to the size of its eyes? 
Has it ocelli? 
