314 Reporr or THE DEPARTMENT OF ENTOMOLOGY OF THE 
Association, which was held in this village. Up to the present 
time its injurious numbers in this orchard have been maintained. 
During the same year Prof. M. V. Slingerland! observed through 
the central portion of the State numerous apple trees with many 
of their leaves showing the corky blisters characteristic of the work 
of this creature. ‘The mites continued to increase in their economic 
importance and in 1905 marked infestation of many orchards in 
Wayne, Ontario, Monroe and Niagara counties was noted. In 
1906 the mite was equally abundant in Livingston, Wyoming, 
Seneca and Yates Counties. Jn his apple orchard survey of Wayne 
County in 1903, Dr. G. F. Warren? recorded the presence of the 
mite in fifty-three orchards. It is stated that ‘“ the mites” were not 
bad in more than one-half of a dozen orchards, but in a few orchards 
some trees had practically every leaf affected.” A like survey? of 
Orleans County in 1904 showed somewhat similar conditions of 
apple trees with respect to this pest. Of nineteen orchards showing 
mite injury, four were recorded as seriously infested, four consider- 
ably infested, and eleven slightly infested. The distribution of this 
species in other parts of this State, and other States, has not been 
determined, but it is quite likely that it will be found in many apple 
yrowing areas, for this past summer its presence was also detected 
in Illinois and Pennsylvania. 
THE FOOD PLANTS OF THE BLISTER MITE. 
The more common food plants of the blister mite are the pear, 
Pyrus communs L., and the apple, Pyrus malus L. Dr. Nalepa 
has also recorded this species on the foliage of the service-berry, 
Amelanchier vulgaris Monch, the common cotoneaster, Cotoneaster 
vulgaris Lindl., the white beam tree, Sorbus aria Crantz., the Euro- 
pean mountain ash, Sorbus aucuparia L., the wild service tree, 
Sorbus torminalis Crantz., and Dr. Rechinger has sent us specimens 
of the work of the mite on Contoneaster tomentosa Lindl., and 
Sorbus mongeoti Crantz., collected in Europe. 
*U. S. Dept. Agr., Ent., Bul. 46; p. 72. 19004. 
*G. Fo Warren,:N: Y7 Cornell’ sta. Bule226, 9.7340. 1005; 
“Ibid. N. Y. Cornell Sta. Bul. 229, p. 489. 1905. 
