or five gallons of water and applying in the form of a spray. 
These materials are sufficiently poisonous to kill the insects, 
but upon exposure to the air lose their poisonous character 
very quickly, so that no harm need be feared from the use of 
cabbage thus treated. 
SUGGESTIONS TO THE TEACHER 
Make sure that every pupil knows what the cabbage 
butterfly is, before much is said about it, to center the 
thought upon the right insect. 
Make the drawings upon the blackboard large, with but 
* few lines, and point out how much smaller the insect is than 
the drawing. 
If you have secured a specimen of the butterfly, have the 
older pupils draw upon paper such parts as they can plainly 
distinguish. 
If you have the green larva, observe how it walks, or eats, 
or acts, when disturbed. 
Ask the pupils to watch the butterfly some day in flight, to 
see how high it goes, how rapidly it moves, and how long 
it can remain on the wing. 
Compare the mouth of the larva with that of the butterfly. 
Have some work of this character done outside of school 
hours by pupils who have the opportunity and zeal. 
LIBRARY of congress 
0 005 049 923 6 
8 
J. Horace McFarland company 
Mt. Pleasant Printery 
Harrisburg. Pennsylvania 
