168 



BRANCH ARTHROPODA 



The tussock moths {Lymantri'idce) (Fig. 138) are of medium size, the 

 antennge of the males being more broadly i)ectiiiated than those of the 

 females. Ocelli are lacking. In some species the females are wingless. 

 The legs are woolly or hairy. The larvse are more beautiful than the adults. 

 They have several bright colored tufts of hair on the back and long pencils 



Fig. 138. — Orgijin Icncostig'ma: a, Larva; h, female pupa; c, male pujKi; 

 d, e, male moth; /, female moth; g, same ovipositing; /;, egg-mass; i, male 

 cocoons; k, female cocoons with moths carrying eggs. All slightly en- 

 larged. (Howard, Farmers' Bull., U. S. Dept. of Agriculture, 1899.) 



of hair on each end of the body. The sixth and seventh segment each 

 bears on the back a coral-red scent gland. It is easy to guess whether these 

 caterpillars are a favorite food of birds. They infest our shade and orchard 

 trees. The eggs are usually deposited upon the cocoon from which the adult 

 female has just emerged, so they may be destroyed by collecting and burn- 

 ing the cocoons in winter. 



