SPIDERS. 109 



eggs within the eggs of the canker-worm moth, and, as tiny 

 as these eggs are, they are still large enough to furnish nour- 

 ishment and room for the complete development of the 

 insect feeding within. 



In Fig. 74 an ichneumon-fly is shown on the wing, in 

 search of caterpillars wherein to deposit her eggs. 



Fig. 67 also represents an ichneumon-fly of large size. 



Fig. 104 represents ichneumon-flies escaping from the 

 chrysalis of the cabbage-worm butterfly. 



FIG. 104. - CHRYSALIS OF THE CABBAGE-WORM, FROM WHICH ARE SEEN ESCAPING ICH- 

 NEUMON-FLIES. 



CHAPTEE XY. 



SPIDEES. 



101. FOE this lesson the pupils are to collect a number 

 of spiders, securing, if possible, the largest specimens. A 

 wide-mouthed bottle, with a little alcohol, will answer to 

 collect them in. Let each pupil select the largest specimen 

 to study, and pin it to a piece of cork, or to a soft pine strip. 

 The legs are to be arranged with two pairs pointing forward 

 and two pairs pointing backward, as shown in Fig. 105. 



Let them study the following characters with the speci- 

 men before them : 



The spider is divided into two regions. That region or 

 part to which the legs are attached is called the cephalo- 



