82 



NEW YORK STATE MUSEUM 



Totals of Fahrenheit readings for ten-day periods, Chatham 



JUNE 



MAXIMUM 



MINIMUM 



I-IO 

 11-20 

 21-30 



651 

 769 



822 



462 



564 

 576 



I-IO 

 11-20 

 21-30 



740 



763 



771 



517 



543 

 551 



I-IO 



11-20 

 21-30 



739 

 829 



490 

 500 

 566 



I-IO 



11-20 

 21-30 



741 

 804 



835 



480 



523 

 584 



I-IO 

 11-20 

 21-30 



765 

 749 

 784 



540 

 496 

 566 



MAXIMUM 

 AND MINIMUM 



I9IO. 



I9II 



I9I3. 



1914. 



1113 

 1333 

 1398 



1257 

 1306 

 1322 



1222 

 1239 



1395 



1221 

 1327 

 1419 



1305 

 1245 

 1350 



Gipsy moth (Porthetria dispar Linn.). Last May a 

 fair- sized gipsy moth colony was discovered at Mount Kisco, West- 

 chester county. The infestation was evidently of two or three years' 

 standing. One oak was rather badly infested and the insects had 

 spread from it to nearby smaller trees and shrubs on a stony hillside. 

 There were several egg masses on trees some distance from the 

 center of infestation. An agent of the State Department of Agri- 

 culture accompanied the Entomologist at the time of the initial 

 examination, and although a few of the insects had commenced to 

 hatch and it was therefore a little late to secure the best results, the 

 outcome of the season's work leaves little to be desired. Efforts were 

 concentrated upon creosoting egg masses, repeated and heavy spray- 

 ings with poison and banding with tree tanglefoot and burlap. 

 Three weeks after the infestation was discovered only three or four 

 small caterpillars were found alive in the center of the colony. Very 

 few living larvae were seen later and on October 2 2d some hours' 

 exploration resulted in finding no living egg masses. 



Several seasons must elapse before it will be possible to say that 

 extermination has been the outcome of the vigorous measures of 

 last summer. Winter scouting may result in finding a few egg 

 masses. There can be little difference of opinion as to the wisdom 

 of adopting extreme measures in such an isolated infestation. The 



