REPORT OF THE STATE ENTOMOLOGIST I9IO 45 



about Yz the length of the second, the fourth shorter than the third, 

 the apical % slightly dilated. Eyes rather prominent, coarsely 

 granulate and reddish brown. Pronotum reddish brown, the 

 anterior third fuscous, except the lateral angles, all sparsely clothed 

 with small, white scales. Scutellum, the most of clavus and the 

 membrane fuscous ; the corium mostly red with a variable fuscous 

 area in the middle and sparsely clothed with fine scales. Abdomen 

 reddish brown ; coxae, femora and tibiae mostly reddish brown, the 

 tarsi somewhat fuscous. 



This species is easily distinguished from the preceding by the 

 fuscous area anteriorly on the pronotum, the absence of a fuscous 

 margin posteriorly and by the fine, whitish scales on the head, 

 thorax and wings. 



Professor Crosby of the Cornell Agricultural Experiment Sta- 

 tion finds a tobacco whale oil soap solution applied just before blos- 

 soming to be an effective spray for use against the young red bugs. 



Pear psylla (Psylla pyricola Forst.). It will be 

 recalled that the season of 1903 was remarkable for the excessive 

 abundance of this jumping plant louse. It was so numerous then 

 that pear trees with blackened, scanty foliage or almost none at 

 all, were common sights during the summer, not only in the Hudson 

 valley but also in central and western New York. Since then there 

 has been comparatively little injury, at least of a general nature. 

 Last season this pest was rather abundant in the pear orchard of 

 James Clark at Milton. On July 21st there were numerous nymphs 

 and some adults upon the trees and considerable honeydew, though 

 this latter had disappeared largely following the rain of a few days 

 earlier. There were very little or no Psylla to be seen upon the pear 

 trees of Mr J. A. Hepworth near the river or upon those belonging 

 to other growers in the immediate vicinity. Reports were received 

 of serious injury by this pest in the central part of the State. 



The experience of the past few years has shown that thorough 

 spraying in early spring with a lime-sulfur wash, such as is used 

 for the control of San Jose scale, is at least a powerful deterrent, 

 if not a preventive of Psylla outbreaks. Mr J. R. Cornell of New- 

 bjirgh believes that the efficacy of such treatment is materially 

 increased by previously scraping the rough bark from the trees. 

 This is undoubtedly true, and where orchards are liable to injury 

 by this species we would advise careful scraping prior to the appli- 

 cation of a lime-sulfur wash or a miscible oil. This should be fol- 

 lowed in every instance by closely watching the trees during the 

 summer. Should Psylla begin to be abundant it should be checked 

 at once by thorough spraying with a kerosene or petroleum emul- 



