A REVIEW EXERCISE. 99 



perhaps most commonly noted are those which guide to 

 proper methods of seeking security from enemies, to the 

 selection of proper places for depositing eggs, and to the 

 construction of nests in which to properly provide for 

 their young. The hunted moth, alighting on a leaf of 

 her own color, and remaining motionless, concealed; the 

 aerial dragon fly, immersing her eggs beneath the water ; 

 the butterfly, depositing her eggs upon the leaves of a 

 plant which has furnished her, as an adult, no food ; the 

 wasp, making cells of mud, and stocking them with 

 paralyzed spiders ; and the bee, constructing her math- 

 ematical cell, and feeding daily by hand her growing 

 young, all are but the commonest illustrations of a 

 faculty which culminates in the social order of some ant 

 communities. 



A REVIEW EXERCISE. 



1. Which of the insects studied have mouth parts 

 adapted for biting? For sucking? Which of the latter 

 have mouth parts armed for puncturing, as well as adapted 

 for sucking ? Which have the mouth parts adapted for 

 both biting and sucking ? 



2. What mouth parts are specialized in seven of the 

 insects studied (one from each group), and what is the 

 advantage to the insect of such specialization? What is 

 the food of each ? 



3. Which of the insects studied breathe by spiracles? 

 Which of these are aquatic ? Which breathe by tracheal 

 gills? 



4. Give examples of insects having legs adapted (1) for 

 standing, (2) for walking, (3) for running, (4) for leap- 

 ing, (5) for swimming, and (6) for seizing prey. 



5. Bring together the drawings that have been made 

 of legs, of wings, of mouth parts, and of antennae, and, 



