556 NEW YORK STATE MUSEUM 
injuring several hundred young ash trees. It was found that while the 
young larvae could be dug out, it was more practicable to kill the older 
ones by injecting carbon bisulfid in the burrows and sealing the holes 
with soap, or else using small pieces of potassium cyanid in place of the 
carbon bisulfid. This work can be done to best advantage in the fall or 
early spring. The carbon bisulfid injures the wood to some extent. 
May 24. Appletree tent caterpillar[Clisiocampa americana] 
very abundant in the vicinity of Buffalo, but there are no signs of the 
presence of the forest tent caterpillar [Clisiocampa disstrial. 
Young larvae of the white-marked tussock moth [Notolophus 
leucostigma] were observed issuing from the egg May 29, and on 
the same date young of the apple tree bark louse [Mytilaspis 
pomorum] were crawling in great numbers on the limbs of apple 
trees. On this date a fully developed Agrilus anxius was 
removed from a birch tree and it was found that great numbers had 
pupated, though a few were still in the larval stage. On May 26 
Saperda moesta was bred fom Populus balsamifera; 
on May 30 Neoclytus erythrocephalus was reared from 
the dead branch of a beech tree. June 1. The work of Saperda 
tridentata, Magdalis armicollis and M. barbita on 
about 1500 elms is described, and the results obtained by cutting and 
burning the infested wood in the early spring were found to be 
very satisfactory. The beetles commenced to emerge May 16. 
June 10, Adults of Agrilus anxius began to issue from dry 
wood June 4. Many dead trees affected by this insect have been 
cut and burned and an effort is being made to preserve others by 
painting them with a mixture of resin and linseed oil (not boiled) in 
the proportion of about 5 pounds of resin to 1 quart of oil, In the 
summer of 1897 the birch trees were badly affected by an aphid 
[Callipterus betulaecolens Fitch] and many leaves dropped 
as a result. In 1898 the attack was renewed, but the pest was 
nearly destroyed by the larvae of the two spotted lady bug, Adalia 
bipunctata. The birch aphis has made its appearance the present 
season, but is being checked by the lady bug. The Canada fly or sand 
fly, as the creatures are known here, are stone flies, caddice flies and 
May flies. On June 1x the stone flies and caddice flies were noticed in 
great numbers; on the r4th the first May fly was seen. ‘These insects 
breed on the Canada side of the Niagara river opposite Buffalo and are 
then carried across the stream by the prevailing winds. June 16. 
Larvae of the white-marked tussock moth [Notolophus leu- 
