80 



ARTIIROPODA 



FIG. 78. Photograph of tent caterpillars four days old on their tent. 

 Natural size. 



the first of which hatches from the white frothy eggs de- 

 posited by the wingless female in late autumn and remaining 

 over winter on the trees. The eggs for the second genera- 

 tion are laid in late summer. In July and September, the 

 light yellowish cocoons an inch or more long are conspicu- 

 ous objects on the rough bark of the trees. 



The gypsy moth (Ocneria dispar), occurring only in Massa- 

 chusetts and Rhode Island, was accidentally introduced 

 from France in 1868. The larva, a brownish hairy cater- 



