Insect Study 391 



there are on the segments? How is the blood purified through these 

 gills? 



7. What are the caddis-worm's enemies? How does it escape them? 

 Touch one when it is walking, what does it do? 



8. On top of the first segment of the abdomen is a tubercle. Do you 

 suppose that this helps to hold the caddis-worm in its case? 



9. What does the caddis-worm eat? Describe how it acts when 

 eating. 



10. How does the caddis-worm build its case? Watch one when it 

 makes an addition to its case, and describe all that you can see. 



1 1 . Can you find any of the cases with the front and back doors closed ? 

 How are they closed? Open one and see if there is a pupa within it. 

 Can you see the growing wings, antennse and legs? Has it breathing 

 filaments like the larva? Cover the aquarium with mosquito netting so 

 as to get all the moths which emerge. See if you can discover how the 

 pupa changes into a caddis-fly. 



12. How does the caddis-fly fold its wings? What is the general 

 shape of the insect when seen from the side with wings closed? What is 

 the texture of the wings? How many wings are there? Which pair is 

 the longer? 



13. Describe the eyes. The antennas. Does the caddis-fly walk 

 on its toes, or on its complete foot? 



14. Examine the moths which come around the lights at night in the 

 spring and summer. Can you tell the caddis-flies from other insects? 

 Do they dash into the light? Do they seem anxious to burn themselves? 



Supplementary reading — "A Little Fisherman," Ways of the Six- 

 Footed, Comstock. 



Spiral case of caddis-ii'orm made of small pebbles and sand. 



Comstock' s Manual. 



Little brook, so simple so unassuming — -and yet how m.any things love thee ! 



Lo ! Sun and Moon look down and glass tJietnselves in thy waters. 



And the trout balances itself hour-long against the stream, watching for its prey; 

 or retires under a stone to rest. 



And the water-rats nibble off the willow leaves and carry them below the wave to 

 their nests — or sit on a dry stone to trim their whiskers. 



And the j\lay-fly practices for the millionth time the miracle of the resurrection, 

 floating up an ungainly grub from the mud below, and in an instant, in the twink- 

 ling of an eye {even from, the jaws of the baffled trout) emerging, an aerial fairy with 

 pearl-green wings. 



And tJie caddis-fly from its quaint disguise likewise emerges. 



And the prick-eared earth-people, the rabbits, in the stillness of early morning 

 play beside thee undisturbed, while the level sunbeams yet grope through the dewy 

 grass. 



And the squirrel on a tree-root — its tail stretched far behind — leans forward to 

 kiss thee. 



Little brook, for so many things love thee. 



Edward Carpenter. 



