Insecta. 15 



8. The nervous system of the grasshopper consists mainly of a 

 white cord extending along the floor of the whole body cavity. In 

 most of the abdominal rings the nerve cord has enlargements 

 called ganglions, from which nerves branch to the surrounding 

 parts. 



THE DEVELOPMENT OF THE GRASSHOPPER. 



1. Late in summer watch grasshoppers to discover the process 

 of laying eggs. If the eggs can be obtained, keep them till they 

 hatch, and watch the growth of the young. 



2. Early in the season catch a number of as young grasshoppers 

 as you can find ; cage and feed them, and watch their growth. 

 What changes take place during development? 



GRASSHOPPER CARD. 



Take a card six inches by four. Make a faint mark length- 

 wise in the middle to aid in placing the parts symmetrically. 

 Separate the parts of the grasshopper, and place them on the 

 card in their proper order. Before beginning, plan the whole 

 arrangement. First, cut off the head ; leaving a central place for 

 the head, remove the mouth parts, pasting each to the card as it 

 is removed. In separating the parts use the forceps, being care- 

 ful to get hold of the very base of each piece ; then, holding each 

 part with the forceps, dip the side that is to go next to the paper 

 into the glue, and carefully place just where it is to stay. This 

 method avoids smearing the card. Avoid getting too much glue. 

 The mouth parts should surround the head ; the wings should be 

 opposite the parts to which they were attached, as also the legs. 

 The legs should be separated to show all the segments; the 

 thorax should be separated into its parts, but the abdomen would 

 better be kept entire. As the parts become very brittle when 

 dry, it is well, if the card is to be kept, to make a little bridge of 

 a slip of paper, on which to string the rings of the thorax and 

 abdomen. The soft parts should, of course, be removed. To 

 preserve the card, place it in a shallow box and fasten it to the 



