THE CANADIAN ENTOMOLOGIST. 59 



CORRESPONDENCE. 



entomological notes from the county of peterboro, ont. 



Dear Sir,- — 



As no work, or but very little, can be carried on at this season 

 out of doors, in aid of the objects you have in view in the publication 

 of the Canadian Entomologist. I forward a few extracts from my note 

 book of last year. 



April 5th, 1875, I captured a fully developed specimen of that very 

 troublesome butterfly. Pieris rapes, in my garden, the thermometer having 

 been only i° above the freezing point on the preceding night, and not 

 having risen beyond $8° during the entire day. 



The Pieris was not nearly so destructive to my plants in 1875 as it 

 was in the previous year, inasmuch as in the fall of that year I had dis- 

 covered and destroyed some hundreds of chrysalids that had attached 

 themselves to the inside of the doors and walls of my tool-houses, and 

 beneath my verandah-roof. In 1874 my cauliflowers and cabbages, during 

 my frequent absence from home, were well nigh eaten up by this garden 

 pest, and such as were not actually devoured were rendered unfit for use 

 by the quantity of excrement deposited between the leaves of the plants. 

 A sprinkling of buckwheat flour was suggested as a remedy, but I tried 

 it without effect. 



May 16. The mischievous flying and hopping Haltica siriolata was 

 swarming in my melon-frames. I dusted the plants with soot, which 

 appeared to disagree with their constitution and prevented their effecting 

 any material damage. I have sometimes tried sprinkling the plants with 

 tobacco water, which forces them to retire to the outside of the frame, 

 where they can readily be destroyed before they recover from the effects 

 of the tobacco. 



May 24. The first Potato Beetle, Doryphora decem-lineata , made its 

 appearance — not on my potato plants, for, since the advent of that inter- 

 esting "bug," I have preferred purchasing to growing potatoes — but on 

 my egg-plants and tomatoes, both of which plants belong (or rather 

 belonged, for the tomato is now Lyeopersicum escu/entum) to the So/anums, 

 as does the potato. I have generally found that where potatoes and egg- 

 plants are grown in the same garden, the Colorado beetles attack the 



