1929] 
Notes on Aphrophora salicis De Geer in America 
53 
Fig. 1. 4, Egg of willow spittle bug, X 25; 5, Third instar nymph, X 8; 
6, Fourth instar nymph, X 8; 7, Adult, X 8; 8, Terminal portion of willow 
twdg killed by egg punctures; 9, Egg-laying puncture enlarged. 
