22 LABORATORY STUDIES UPON TYPIC ANIMALS 



12. Enemies. 



(1) What is this animal's particular mode of defense 



against them? 



(2) Does it have any peculiar mode of attacking them? 



If so, what? 



(3) Name its means of defense. 



(4) What are the enemies of the young? 



(5) Does the male or the female defend the young? 



(6) Is the young able to defend itself? If so, how? 



13. Covering. 



(1) Does the covering of the young differ from that of the 



adult? If so, how? Does it ever change in thick- 

 ness from environment causes? 



(2) Uses of this covering to the animal? 



(3) Use to man? 



(4) What inferences as to the habits and habitat of this 



animal do you draw from its covering? 



(5) Does this animal have an ecdysis? Describe. 



14. Color. 



(1) What gives this animal its color? 



(2) Significance of its color and color patterns? 



(3) Does the color of the young differ from that of the 



adult? If so, how? Why? 



(4) Does the color of the male differ from that of the 



female? If so, how? Why? When? 



(5) Does the color of different individuals of the same sex 



vary? If so, how? Why? 



(6) Does the color of the same individual vary at different 



seasons or under different environment conditions? 

 If so, how? Why? 



15. Resemblances. 



(1) Any special protective resemblance? (S. P. R.) 



(a) If so, what does it resemble? 



(b) How? 



(c) Why? 



(2) Any variable protective resemblance? (V. P. R.) 



Describe. Cause? 



(3) Any aggressive resemblance? (A. R.) If so, what 



does it resemble? 



