lO MAINE AGRICULTURAL EXPERIMENT STATION. I9II. 



HOMOPTERA. 



Gossyparia spuria (Elm bark louse). 

 Badly infested twigs of the American Elm were sent in from 

 Castine, Maine. Several trees upon the University campus at 

 Orono are also affected. Lot No. 1298. 



Phcnococcus sp. 



Some specimens of what may be P. dcarncssi with the descrip- 

 tion of which they agree, were sent in from Wiscasset, Maine, 

 in June. The white downy secretions make this insect a conspic- 

 uous object. They were found under the bark of an apple tree. 

 Lot No. 1244. 



Bnlecanium canadcnse. 



This species was abundant on the branches of an elm tree in 

 Bridgton, Maine, June 9, 1910. Lot No. 1207. 



Chionaspis lintneri. 



One tree of Bctula popiilifolia, was found in Orono in August 

 badly infested with this scale. Lot No. 1300. 



PSYLLIDAE. 



EDITH M. PATCH. 



So little attention has been paid the psyllids in New England 

 that a group of 6 species taken in Maine during the summer of 

 1910 has been of interest to the collectors. Two of these, at least, 

 Psylla pyricola and P. striata, from the character of the host 

 plants are of real economic importance, the one being at times 

 a serious pest of the pear and the other when abundant being 

 injurious to the new growth on shade birches. Besides these 6 

 species, a blackberry psyllid is sometimes abundant in Maine 

 but we have at present no material to work up for this. 



For the study of structural characters, the admirable paper by 

 Mr. H. B. Stough* has been of great aid and the species here 

 briefly recorded were worked over with reference to that pub- 

 lication. For the Comstock-Needham terminology of psyllid 



*I910. H. B. Stough. The Hackberry Psylla. Pachypsylla Celtidis- 

 mammae Riley. A sudy in Co-nparative Morphology. The Kansas 

 University Science Bulletin, Vol. 5, No. 9. 



