1912 ENTOMOLOGICAL SOCIETY. 19 



One of the Soldier Bugs^, PeriUoides claudus, appeared in considerable num- 

 bers this year in the potato fields, where it fed upon the larvae of the potato beetle. 

 Early in August I found several of these bugs in the nymph stage feeding on 

 Tussock Moth larvae. Claudus has never been a common insect in Ontario, and 

 why it should have become abundant and so generally distributed this year is a 

 mystery. Any natural enemy of the Potato Beetle will certainly be welcomed in 

 Ontario, and it is to be hoped that having gained a foothold here it will increase 

 and multiply suflficiently to keep in check one of our most expensive and trouble- 

 some insect pests. 



The only new insect taken by me this year is an Arctian, evidently of the 

 genus Apantesis. This I have as yet been unable to identify. 



Division No. 7, Niagara District — H. C. Treherne. 



I have the honour to present my second annual report for the Niagara District. 



A movement of great importance to the Entomological interests of Ontario 

 has, during this past season, taken place in the Niagara District. Through the 

 courtesy of the Provincial Department of Agriculture for Ontario, the establish- 

 ment of a field station for Entomological investigation, under the Division of 

 Entomology of the Dominion Department of Agriculture, has been made possible. 

 Office space has been allotted to the Field Officers of the Division of Entomology, 

 at the Provincial Experiment Station, situated at Jordan Harbour, Ontario. 



Acting on the instructions of Dr. Hewitt I have had the pleasure of making 

 this office my headquarters for a few months this summer. It is to be hoped, 

 henceforth, that this field station will be the basis for much useful work, for the 

 province of Ontario in particular. 



The Weather, 



The weather throughout the Niagara District has been more or less favourable 

 to fruit production, and well suited to insect life. The Spring was especially 

 favourable for blossoming, and fruit set well. Most of the insects common to fruit 

 put in their appearance in advance of the ordinary season. Severe drought and 

 extreme heat were experienced in July. From Meteorological Observations of 

 Jordan Harbour, July 3rd, with a maximum temperature of 103 degrees F. proved 

 the hottest day, while the last day of frost, from the same observations, proved to 

 be May 3rd. 



The following dates show the days on which frbat was experienced this Spring 

 (1911) :- 



March 28th — April 3rd, below 32 degrees F; April 4th, 7 a.m. 24 degrees F., 

 6 p.m., 30 degrees F; April 8th, 7 a.m., 31 degrees F., 6 p.m., 35 degrees F; April 

 9th, 7 a.m., 31 degrees F., 6 p.m., 37 degrees F; April 11th, 7 a.m., 32 degrees F., 

 6 p.m., 37 degrees F; April 24th, 7 a.m., 32 degrees F., 6 p.m., 40 degrees F; May 

 3rd, 7 a.m., 30 degrees F., 6 p.m., 32 degrees F. 



