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. Apple tree 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 disstria]. 

 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 [ M y t i 1 a s p i s 

 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 from Populus balsamifera; 

 on May 30 Neoclytus erythrocephalus was reared from 

 the dead branch of a beech tree. June i. The work of Saperda 

 tridentata, Magdalis armicollis and M. b a r b i t a 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 i 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, A d a 1 i a 

 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 i the stone flies and caddice flies were noticed in 

 great numbers; on the 14th 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- 



