INSF.CTS AFFECTING PARK AND WOODLAND TREES 279 



valuable trees should have all their infestetl branches cut away and burned. 

 It niii^ht pay in the case of hiyhly prized individuals on lawns to spray 

 them about the middle of May with arsenate of lead, using one of the 

 prepared paste forms at the rate of 6 to 8 pounds to 50 gallons of water 

 and taking spi;cial pains to cover the twigs aiul base of the leaf stalks with 

 the insecticide. The object of this is to kill the beetles as they begin to 

 gnaw their way into the twigs and leaf stalks. Similar treatment of the 

 limbs and trunk might aid to a considerable extent in preventing the 

 entrance of the beetles though it would require very thorough work, as the 

 insects usually enter the tree from under some projecting scale of bark, a 

 place where it would be very difficult to put the poison. Our principal 

 dependence must be in the destruction of the infested trees. 



Bibliography 

 1869 LeConte, J. L. Synopsis of the Scolytidae of America north of Mexico. Am, 



Ent. Soc. 'I'rans. 2: 165 

 1S90 Packard, A. S. U. S. Ent. Com. 5th Rep't, p. 294-95 



1895 Smith, J. B. N J. Agric. Exp. Sta. Rep't, ]). 465-73 



1896 Johnson, C. W. Dep't Agric. Pa. Rep't, p. 360-61 



1896 Osborn, Herbert. la. Agric. Exp. Sta. Bui. t,:^, p. 594-95 

 1902 Felt, E. P. Country Gentleman, Ap. 3, 67: 291 



Banded ash borer 



Ncoclytjis capraca Say 



Logs of black ash and dying trees are frecpiently seriously injured by borers belong- 

 ing to this species. 



This insect has been known for years, and Dr Riley has placed on 

 record an instance of serious injury presumably by this species. Mr Shelby 

 Reed of Scottsville N. Y., in 1880 referred briefly in the American Ento- 

 mologist, to a widespread destruction of black ash forests in his vicinity by 

 an insect which w^as probably this species. The beetle may be recognized 

 by the following description : 



Dark brownish purple, head and thorax darkest ; eyes nearly circular, 

 behind them a narrow vellow border; thorax barrel-shaped, deep purple. 



