TENTH BEPORr OF THE STATE ENTOMOLOGIST 425 



20. Has it failed to appear in any locality where it occurred in 1877 ? 

 In answer to any of the above, the question may be indicated by the 

 number prefixed to it . 



J. A. LiNTNKB, 



State Entomologist. 

 Albany, Jane 13, 1894. < 



Nearly a thousand copies of the above circular were distributed, but, 

 with the usual result that attends such inquiries, comparatively few 

 replies were received — less than one hundred . It is strange that when 

 so simple a task is asked for as a few words upon a postal card, that so 

 few persons are disposed to comply with the request, but negligently 

 withhold what might be an important contribution to science . 



The answers returned to question 1, gave insufficient data for the 

 preparation of the map proposed, to show the portions of the Hudson 

 river counties occupied by the insect, but much interesting and valuable 

 information upon other points was obtained which will be put in form 

 for as early publication as is possible. 



A number of photographs were secured of the pupal buildings thickly 

 dotting the ground at the New Baltimore locality, and of others, illus- 

 trating various forms and conditions from specimens placed in the State 

 Museum Collection, from other localities in the State where the build- 

 ings were also found. 



Psylla pyricola (Foerster). 



The Ptar- Tree Psylla. 



(Ord. HfiMiPfiCKA: Subord. Homopiera: Fam. Psyllidje.'^ 



In writing of the distribution of Psylla pyri ola, in the preceding 



report (Ninth, for 1892), it was stated that the insect had been studied 



in Central New York by Mr. M. V. Slingerland, at Ithaca, Tompkins 



county, but " in Western New York it must occur sparingly if at all," 



for reasons stated. 



Its Occurrence in "Western New York. 

 Since then, two notices of its presenc*^ in western counties have come 

 to my knowledge. Mr, Sherman Williams, of Bluff Point, Yates 

 county, has written that about one hundred of his pear-trees, twelve 

 years old, show^ed attack in 1891, of whit he pow recognizes as the 

 pear-tree Psylla. The blossoms dropped and the blackened leaves 

 54 



