88 



SCHOOL ENTOMOLOGY 



FIG. 59.-Coeoons of the Bag-worm 

 Moth (Psychidce). 



FIG. 60. Nest of Tent-caterpil- 

 I:. (Lotfcttmputo). Compare 

 with Fig. 61. Reduced. 



Slug-caterpillars (Eudei- 

 dce) represent another rather 

 small family which is known 

 much better through its 

 larvae than through the 

 moths. The moths are usu- 

 ally dark colored, though 

 some species are marked 

 with rich greens and are 

 very beautiful. The larvae 

 are not like ordinary cater- 

 pillars, but the legs are 

 reduced in size so much 

 that the insect crawls on 



the under surface of its 

 ^ much Uke the common 



slug or a snail. These 

 slug-caterpillars are usually 

 brightly colored and take 

 the most bizarre shapes. 

 All are small. One species 

 is clothed with spines that 

 are slightly poisonous and 

 irritating. This is the "sad- 

 dle-back," so-called from 

 the marking on the back 

 which suggests a green sad- 

 dle on a rich, dark reddish 

 saddle-cloth. It feeds mainly 

 on apple and some orna- 



mental shrubs. 



. 

 Tent-caterpillars (Lasio- 



campidce) are represented by 



