166 



BRANCH ARTHROPODA 



The owlet moths (Xoclu'idtr), of which there are more than twenty-five 

 hundred species in America, fly at night and are familiar visitors around our 



I 6 / 

 p 



Fig. 135. The spring canker-worm: a, Egg mass, natural size; 6, egg, mag- 

 nified; c, larva; d, female moth; e, male moth. (Riley.) 



evening lights. To these belong the numerous cut -worm moths and army 

 moths. Most of this large family are inconscipuous and dull colored, but 



Fig. 130. The boll-worm or corn-ear-worm. (Riley.) 



the group of " underwings," or Catoc'alas, are exceptions to this rule. 

 Strangely enough it is their posterior or under wings which are conspicu- 



