OF WASHINGTON. 



pods have been introduced from one country into another. Dr. 

 Stiles asked whether any physiological observations had ever been 

 made as to the effect of 'high altitudes upon insects. Dr. Dyar 

 replied that Dr. Scudder had reported that certain species found 

 in high altitudes seemed to lose vigor when brought down to a 

 lower elevation. This was the only observation of the kind which 

 he recalled. 



Then followed the paper by Mr. Simpson, entitled : 



NOTE3 ON THE LIFE HISTORY OF THE CODLING MOTH. 

 By C. B, SIMPSON. 



(Author's Abstract.) 



In the Pacific Northwest there has been much diversity of opinion 

 in regard to the number of the broods of Carpocapsa pomonella 

 Linn. During the past few years three broods was the commonly 

 accepted number. In attempting to solve this question of the 

 number of broods, Mr. Simpson found great difficulty in de 

 termining the limits of a brood on account of the great over 

 lapping. Upon examining records of larvae killed under bands, 

 it was noted that at certain times there was a greater number 

 of larvae under bands than at other times. Numerous circu 

 lar letters were sent to the Idaho fruit-growers in 1901, asking 

 them to keep band records. These records were tabulated and 

 curves drawn on cross-section paper. Mr. Simpson exhibited a 

 number of these curves. It was noted that on all curves there 

 were two distinct maximums of larvae going under bands. From 

 these facts he concludes that there are only two full broods in 

 Southern Idaho. A possibility of a third brood was mentioned. 

 Observations in orchards were deceiving. Prof. Gillette had con 

 cluded that there were only two broods in Colorado. In Idaho 

 the Codling moth was but little injurious in the transition life zone. 



Mr. Simpson exhibited many photographs taken by himself of 

 the insect in its different stages, its work upon fruit, methods of 

 control, and Idaho orchards. 



In discussion, Dr. Howard said that he had heard Prof. Gil 

 lette's paper on this pest read before the meeting of the Associa 

 tion of Economic Entomologists at Denver last summer. Prof. 

 Gillette then made the sweeping assertion that two broods was 

 the rule for this insect over the whole United States. His con 

 clusions, however, were drawn almost entirely from observing 



