100 



The President appointed as committee on nomination of officers 

 Messrs. Webster, Kellicott, and South wick. 



The Association then adjourned to meet at 10 a. m. August 16. 



AUGUST 16— MORNING- SESSION. 



The Association commenced at 10 a. m., President Lintner in the 

 <jhair. The minutes of the preceding session were read and approved. 

 On motion of Mr. Osborn the Secretary was instructed to assess the 

 members sufficiently to provide funds for paying tlie necessary ex- 

 penses. Carried. 



Mr. KeUicott offered the following resolution, which was adopted by 

 the Association : 



Resolved, That one member of this Association be appointed a committee (to act 

 with similar committees appointed by other societies) to confer with the council of 

 "the A. A. A. S. regarding a change in the day of the week set for the beginning of 

 its annual meetings. 



Mr. KeUicott was appointed by the President as a committee to pro- 

 ceed in accordance with this resolution. 

 The first paper brought before the Association was as follows : 



THE PEAR-TREE PSYLLA. 



{Psylla pyricola.) 

 By M. V. Slingerland, Ithaca, X. Y. 



This insect appeared in enormous numbers in different parts of this 

 State, especially in the Hudson Eiver Valley and at Ithaca, during 

 1891; and orchards which promised 1,200 barrels of fruit at blossoming 

 time developed less than 100 barrels 5 leaves and blighted fruit dropped 

 in August, and some trees were killed. It is one of the most serious 

 pests that pear-growers have to fear. 



The adult insect measures scarcely three millimeters in length, is 

 very active, and strikingly resembles a Cicada in miniature. The 

 nymphs are oval, exceedingly flat objects, of a light yellowish color when 

 young, but becoming blackish with distinct markings when full grown. 

 The light yellowish cylindrical-ovate eggs, which are scarcely visible to 

 the unaided eye, are attached by a short stalk near the larger end, and 

 have a long slender thread projecting from the smaller end. 



My observations upon this pest began in December, 1891. At that 

 time adults and a few nymphs were found hidden in the crevices of the 

 bark of the pear trees ; no eggs were found. The hibernating adults 

 were watched, and the trees carefully examined at various times dur 

 ing the winter, but no eggs were laid until about April 10, when the 

 adults were frequently seen in copulation. These eggs were laid in the 

 creases of the younger branches, about the bases of terminal buds. 

 Eggs on branches brought into the insectary at this time hatched in 



