Close-up of a, ovipositing female; b, male; c, 
female pupa; d, male pupa; e, old egg mass. 
Larvae on oak leaf: f, first instar; g, second instar; 
b, fourth instar; i, sixth instar or mature larva. 
Egg masses, k, under branches and on rock; /, 
young larvae spinning down, a to i about natural 
size; k and l reduced. (See other side for life 
history and control.) 
Picture Sheet No. 26 
Bureau of Entomology and Plant Quarantine, Agricultural Research Administration, 
United States Department of Agriculture 
