AND THE MECHANIC ARTS. 529 



Aug. 10, '08. Elkin.— Hard wood. 



Aug. 23, '08. New Hampton. — Maple, birch. 



It is interesting to note that the outbreak in New Hampshire 

 seems to be simply an extension of the infested region in Maine. 

 According to the Circular of Information issued by E. F. Hitch- 

 ings. State Entomologist of Maine, the attack has extended to 

 the north and east from the Ossipee valley, including the towns 

 of Bethel, Brownfield, Bridgton, Auburn and Fairfield, as well as 

 numerous other localities in this region. 



Methods or Contkol. 



At present it seems almost useless to try to suggest any 

 means of eliminating this pest from the vast forest areas which 

 have become infested. The problem, however, is much more 

 simple with shade and orchard trees where proper means of 

 control are adopted. 



The simplest and surest method is spraying, using an ordinary 

 barrel spray pump and plenty of hose, so the operator may 

 climb up in the tree, and be able to spray the outer and topmost 

 branches. 



The best arsenical spray for this purpose is the arsenate ot 

 lead, from three to five pounds per barrel of water. This will 

 probably prove most effective if applied as a mist spray, the 

 spray being thrown from the body of the tree outwards against 

 the under side of the leaves. There are two reason for this: 

 First, a rain is less liable to wash off the poison from the under 

 side of the leaves; and, secondly, the larvse feed from the under 

 side. In spraying for Heterocampa care must be taken to thor- 

 oughly drench the topmost branches, as the larva will be found 

 there. From what is known of the life history, the spraying 

 had best be done between the first and , middle of July. The 

 worms at this time may not be very much in evidence, but still 

 may be easily detected. 



As a further preventative the trees may be banded with 

 sticky fly paper or tanglefoot, or building paper smeared with 

 a thick layer of printer's ink, to prevent any larvae that may 

 fall to the ground from crawling up the trunks. This is par- 

 ticularly advisable if the sprayed trees are near a woods or 

 other infected trees, which may not be sprayed. 



BiBLIOGBAPHT. 



1855. Cecrita guttivitta. Walker. Lep. of Brit. Mus. Cat. VoL 



5, pg. 992. 



1856. Cecrita alMplaga. Walker. Lep. of Brit. Mus. Cat Vol. 



7, pg. 1748. 



