24 THE CONNECTICUT POMOLOGICAL SOCIETY. 



peach trees in the orchard of Barnes Brothers at Yalesville, 

 during the month of June. As was there mentioned, tliis 

 insect proved to be a new species, and was described by Dr. 

 A. D. MacGilHvray* of Cornell University as Pamphilius 

 persicum. Last summer the insect was extremely abundant 

 and threatened to do much damage. During the season a 

 study was made of its life history, so now we know something 

 about it and how to combat it. Most of the field work was 

 done by my assistant, Mr. Walden, and a full account will 

 appear in the forthcoming report of the State entomologist, 

 but a few of the chief facts regarding the pest may be given 

 here. The eggs are laid about the second week in June on 

 the under sides of the leaves, being placed horizontally 

 against the midrib, like those of the imported currant worm. 

 The eggs are white, and are oval in shape. They hatch in 

 about a week, and the young larvae spin a few threads and 

 begin to feed upon the leaves, first eating channels from the 

 margin toward the midrib, then rolling the free corners 

 over themselves to form a case ; they continue feeding until 

 perhaps the leaves are all devoured. The larv?e, after reach- 

 ing full size, go into the soil and assume a brilliant apple 

 green color, remaining in the ground until the following 

 spring before pupating. Adults appear two weeks after 

 pupating, and eight days before laying eggs. At the time 

 of their emergence they fairly swarmed over the trees and 

 weeds in one section of the orchard. The adult is a four- 

 winged sawfly, allied to the adult of the currant worm, and 

 there is but one generation each year. 



Rather elaborate experiments were conducted by Mr. 

 Walden with methods of controlling this insect. It has been 

 supposed that the peach leaves would be injured by the appli- 

 cation of poisons. We know that Bordeaux mixture will 

 cause them to drop. I have injured them severely with weak 

 kerosene emulsion and with common soap and water (one 

 pound in eight gallons). Quaintance states* that in the 



*Canadian Entomologist, Vol. 39, p. 308, September, 1907. 



