28o MAINE AGRICULTURAL EXPERIMENT STATION. I916. 



This account is brief and while it has been reproduced in 

 Packard's Forest Insects neither of these works is so generally 

 available at present as to be accessible to all who might wish 

 to see it, and it seems desirable therefore to quote it here. 



"In June, a spot of white froth, resembling spittle, appear- 

 ing upon the bark near the ends of the branches, hiding within 

 it a small white wingless insect having six legs, which punctures 

 and sucks the fluids of the bark, and grows to about a quarter 

 of an inch in length by the last of that month, and then becomes 

 a pupa of a similar appearance, but varied more or less with 

 dusky or black, and with rudimentary wings resembling a vest 

 drawn closely around the middle of the body ; the latter part of 

 July changing to its perfect form with wings fully grown, 

 and then no longer covering itself with foam, but continuing 

 to the end of the season, puncturing and drawing its nourish- 

 ment from the bark as before. The perfect insect, a flattened 

 oval treehopper, 0.40 in. long, with its wing covers held in form 

 of a roof, its color brown from numberless blackish punctures 

 upon a pale ground, a smooth whitish line along the middle of 

 its back, and a small smooth whitish spot in the center of each 

 wing cover, its abdomen beneath rusty brown." 



This short account while giving the main points in the life 

 cycle of the insect leaves many points to be desired and it was 

 in hopes of supplying some of these wanting details that obser- 

 vations were begun upon the species in the summer of 1914. 



At this time the nymphs in their frothy masses were quite 

 plentiful on the Scotch Pines on the University Campus and it 

 was hoped that by watching their development to verify the 

 connection between these nymphs and the adult form. As 

 stated by Fitch the nymphs were attached near the tips of the 

 twigs and their presence was made very manifest, not only by 

 the frothy masses, but by the sappy exudations running down 

 on the branches so that there was a distinct discoloration. 

 Usually only one nymph was observed on a twig and these were 

 scattered over the tree. A number were enclosed in cheese 

 cloth coverings to secure adults, but most of these were removed 

 by some one who evidently counted them unsightly. However 

 the rearing of some individuals and the securing of others 

 either in process of emergence or in close proximity to the cast 

 off skins leaves no question as to the larvae observed being the 

 young of this species. 



