1 62 



THE ANIMALS AND MAN 



simply to the surface when the dehcate, gauzy-winged 

 adult quickly issues. The adult Mayfly takes no food and 

 lives only a few hours, or at most a few days. The May- 

 flies have the shortest adult stage of all insects. The 

 female drops her eggs into the water. 



Moths and butterflies are among the most attractive and 

 instructive insects to collect and classify and to rear as 



caterpillars and chrysalids in the 

 schoolroom or at home. Some 

 of the most beautiful butterflies 

 and largest and most striking 

 moths are common all over the 

 country and their eggs, or cater- 

 pillars at least, can certainly be 

 found and reared in simple 

 breeding-cages (for directions for 

 making see Appendix II) in the 

 schoolroom. Directions for the 

 study of caterpillars have already 

 been given in Chapter VIII. 



Scudder's "Every-day Butterflies," 

 Mary Dickerson's "Moths and Butter- 

 flies," and Eliot and Soule's "Cater- 

 pillars and their Moths, " are admirable 

 books. Reference to them will give 

 suggestions for an unlimited amount of 

 Fig. 71 Young (nymph) of observation. Scudder's "Life of a 

 a Mayfly showing (g) ^^^^^^^ -^ ^ ^^^^^^^ ^^^^^^t ^j tj,^ 

 tracheal gills. (Three i u ^, n /-< .11 «tt 



times natural size; after monarch butterfly. Comstock's "How 

 to Know the Butterflies, " and Holland's 

 "The Butterfly Book," are finely illus- 



Jenkins and Kellogg.) 

 trated manuals of butterfly classification 



Scorpions, spiders, mites, and ticks (class Arachnida). — 



The class Arachnida is composed of Arthropods whose body- 

 segments are grouped into two regions, a cephalothorax bear- 

 ing the mouth-parts, eyes, and legs, and an abdomen. The 



