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JOURNAL OF ECONOMIC ENTOMOLOGY 



[Vol. 8 



the female in depositing the egg, a sweUing is produced in the vein 

 at the point where the incision was made, causing the vein to angle 

 upward shghtly at this point. The new generation of adults begin 

 to emerge about the middle of May, and continues to emerge till the 

 second week in June, and are to be found during the latter part of 

 May and the whole of June feeding on the foliage of apple and nearly 

 related trees in orchards and woodlands. By the latter part of June 

 they begin to descend to the ground and hide away among the leaves 

 and grass, and in the soil, where they remain for the rest of the season, 

 apparently without food, and during the following winter, to reappear 

 in spring. By the end of the first week in July all the beetles have 

 disappeared from the trees. These adults are quite active during the 

 month of June, and may be seen flying from tree to tree in the orchards. 

 For the rest of the season they remain dormant. When a leaf upon 

 which a beetle is resting is disturbed the beetle usually falls to the 

 ground and feigns death. 



Food Plants 



Larval mines have been found in the leaves of apple, crab-apple, 

 and Crataegus. The adult beetles feed upon the leaves of apple, crab- 

 apple, Crataegus, wild cherry, and choke cherry, and an occasional 

 feeding puncture has been found on leaves of pear trees growing in 

 apple orchards. When confined in a cage on pear leaves, they will 

 feed freely on them but will not deposit eggs in the veins. The adults 

 of the new spring generation evidently fly about considerabty, since 

 they are to be found throughout woodlands, near infested orchards 

 whercA^er the trees above mentioned are found. 



CoNTEOL Measures 



The serious injury caused by this insect in some localities during the 

 spring of 1913 made it seem advisable to devise some means of con- 

 trolling it, and the writer was selected for this work. Experiments 

 began June 10, 1913. At this time the hibernating beetles had dis- 

 appeared and the adults of the new generation were feeding on the 

 foliage in large numbers. The work was continued the folloT\ing 

 spring, beginning early before the hibernating beetles had emerged 

 from their winter quarters. The results of the experiments may be 

 briefly summarized under the following heads: Sticky bands, arsenical 

 sprays, and contact spraj^s. 



Sticky Bands. — At the time when the experiments began many 

 beetles were seen crawling up and down the trunks of the trees. A 

 number of trees in a badly infested orchard at Newton, 111., were 

 banded with tanglefoot, with the expectation that many of the beetles 



