Teachers' Leaflet. 541 



7. Does it feed upon the upper or lower surface of the leaves? 



8. If disturbed what does the caterpillar do? 



9. When it is down in the grass how do its cross stripes protect it 

 from observation ? 



10. Does the caterpillar feed during the night as well as by day ? 



11. When resting does it hide beneath the leaf? 



Facts for the teacher. — The milkweed caterpillar is a striking object and when 

 fully grown is about two inches long. Its ground color is green with cross- 

 stripes of yellow and black. On top of the second segment back of the head are 

 two, long, slender whiplash-like organs and on one of the rear segments is a 

 similar pair. When the caterpillar is frightened the whiplashes on the front of 

 the body twitch excitedly ; when it walks they move back and forth. Those on the 

 rear end of the body are more quiet and not so expressive of caterpillar emotions. 

 These filaments are undoubtedly of use in frightening away the little parasitic 

 flies which lay their eggs upon the backs of caterpillars and the young of which 

 feed upon the non-vital organs and bring about death through weakening their 

 victim ; the whiplashes serve to brush off and drive away these rascally intruders. 

 The caterpillar will feed upon no plant except milkweed ; it feeds both by day and 

 night with intervals of rest, and when resting hides beneath the leaf. When dis- 

 turbed it drops to the ground where its fine cross-stripes render it quite invisible 

 amiong the blades of grass. 



LESSON XV. 



THE MONARCH CHRYSALIS. 



Purpose. — To call the pupil's attention to the beauty of color and 

 form of this living gem. 



Observations for pupils: 



1. What is the shaps of the chrysalis? 



2. What is its color? 



3. How and where is it ornamented ? 



4. A\'hich part covers the wings of 



the butterfly ? 



5. To what is the chrysalid at- r ti 

 tached? ' : 



6. Is it in a position where it does ' ^ 

 not attract attention? 



7. How is it attached to the object 

 on which it is hung? 



8. How long after the chrysalis is —} 

 formed before the butterfly emerges ? 



9. Does the chrysalis change color 

 as the time draws near for the butterfly , 

 to emerge? Chrysalis of the monarch buttertly 



