REPORT OF THE STATE ENTOMOLOGIST IQI7 4I 
numerous and practically controlling the insect, which disappeared 
before mid August. 
Niagara county. Generally distributed and serious in some places, 
the insects leaving the potatoes about August 2oth. 
Oneida county. Aphids were reported as quite prevalent in 
unsprayed fields. 
Ontario county. Generally present though not injurious. 
Orange county. The pests were numerous in many small back- 
yard patches and in a few larger fields. In early July and the 
latter part of the month they were so numerous as to be practically 
a plague. The insects disappeared during the second week of 
August. 
Oswego county. About 90 per cent of the fields were infested 
though the insects were not present in sufficient numbers to cause 
serious damage. 
Rockland county. Aphids were reported very injurious and 
abundant, ruining probably 50 acres. 
Schuyler county. It was estimated that 50 per cent of the fields 
in the county were infested but most of them were not seriously 
affected. 
Suffolk county. The infestation was placed at too per cent and 
in the town of Riverhead 10 per cent of the fields were probably 
seriously damaged, though Professor Sirrine expresses the opinion 
that the aphids by destroying the flower stalks may not be entirely 
injurious. Mr Latham of Orient places the decrease in the crop 
at Io per cent and the last of July reported that from one-half to 
two-thirds of the insects were infested by parasites. 
Ulster county. Aphids were generally prevalent in the county, 
some 12 per cent of the fields being infested and the insects causing 
an estimated decrease of the crop placed at 10 to 75 per cent. In 
a few cases entire fields were destroyed. The percentage of infested 
fields in various towns ranged from 18 to 80 and the per cent 
seriously affected from 6 to 60. The insects appeared first July 
1oth and caused the greatest damage July 21st, beginning to 
disappear on the 23d. 
Washington county. It was estimated that 5 per cent of the 
fields were infested with a 5 per cent decrease in the crop. 
Habits and life history. This aphid, like the well-known apple 
species, winters as a shiny black egg and more frequently on the 
rose than any other host. With the coming of warm weather these 
hatch and some of the winged individuals fly to potatoes and start 
colonies. The young become full grown in about ten days, thus 
