REPORT OF STATE ENTOMOLOGIST 1899 545 
was reported very abundant at Union Springs by J. Jay Barden and as 
present at Auburn by Joseph Foord. Much damage was said to have 
been caused in the former locality, but later this report was modified as 
the injury proved to be less than was at first supposed. Livingston 
county: W. R. Houston reported the cicada to be in numbers at 
Geneseo, present at Groveland and very abundant at Avon. Monroe 
county: Lewis Hooker found it at Rochester and M. S. Baxter sent in 
specimens from Penfield. Onondaga county: Miss A. M. Armstrong 
found it in large numbers at Syracuse. Yates county: Cyrus Crosby 
reported the cicada present in greater or less numbers at Dresden, 
Bellona, Long Point and Mays Mill. 
Drepanosiphum acerifolii Thos. The drouth, specially in the 
western part of the state, has apparently been very favorable to this 
beautiful species. At Onondaga Valley, Syracuse, in early September 
many maple leaves had fallen, those in the upper portions of the trees were 
badly curled and much honeydew was seen on the foliage. The trees 
proved to be badly infested with this plant louse, which was doubtless at 
least partly responsible for the bad condition of the trees. At Batavia 
many infested maples were seen but the injury was not so great as at 
Syracuse. The work of this species was also observed at Amsterdam 
and in Albany, but it was doing less damage in the latter place. A few 
Syrphid larvae were found on the infested trees. 
Experiments with arsenical poisons. Comparative experiments 
with a few of the more important arsenical poisons were conducted last 
spring in connection with field observations. Vigorous elm leaf beetles, 
Galerucella luteola Miill., were collected May 4 and ro placed 
in each of six breeding cages. All were provided with twigs of English 
elm bearing tender leaves. The ends of the twigs were placed in small 
bottles of water in order to keep the foliage fresh. All were treated 
alike, except that the leaves in cages no. 1-5 were thoroughly sprayed 
with poisons as given in the table below. An atomizer was used for 
spraying and whenever it was found necessary to renew the leaves, 
because of their wilted condition, the foliage was treated as at first and 
the spray allowed to dry before the fresh food was placed in the cage. 
This prevented any disturbance in feeding owing to the leaves being 
wet. In starting the experiment, the sprayed leaves were placed in the 
cages wet because that would be their condition after spraying outdoors, 
though in most cases the water would evaporate much more quickly 
than in the cages. 
