December, '08] JOURNAL OF ECONOMIC ENTOMOLOGY 399 



Further pests briefly discussed were the Codling-moth, the Turnip 

 and Pea Aphids, and a Leaf Hopper {Empoasca sp.) attacking the 

 foliage of potatoes. Nothing of special interest in regard to the 

 Codling-moth was reported. Its ravages this year have, as usual, 

 been severe in unsprayed orchards and even in some sprayed orchards 

 in the Niagara district. 



The Turnip and Cabbage Aphis was reported from every part of 

 the province, and has done unprecedented damage, especially to the 

 turnip crop. The ordinary methods of control were recommended by 

 some, but others believed that in a season like this no known means 

 could keep these insects from spreading in countless numbers over 

 turnip fields. 



The Pea Aphis has done much damage, especially to late peas, whole 

 fields of these having been destroyed. It was found that a very large 

 number of the aphids, in some cases nearly 100%, were attacked and 

 destroyed by a fungus disease that spread with great rapidity in some 

 districts. 



Mr. A. Gibson of Ottawa reported much damage to potatoes in the 

 eastern part of the province from the attacks of a Leaf Hopper (Em- 

 poasca sp.) which seriously injured the foliage. 



The chief speaker on the first evening was Dr. E. P. Felt of Albany, 

 N. Y., who gave an illustrated lecture on "The Interpretation of 

 Nature." The first part of the lecture was devoted to showing the 

 work and habits of bark-boring insects. Many beautiful views made 

 these points clear and revealed a most interesting field for insect 

 study, and one new to most of the audience. In addition to the bark- 

 borers many other kinds of insects of economic interest, especially to 

 residents of towns and cities, were shown and their importance briefly 

 pointed out. The lecture closed with an account of the House-fly as a 

 source of danger to public health. 



The morning and evening of the second day were devoted chiefly 

 to the reading of a number of papers, mostly of a technical nature. 

 Among those of an economic or popular character were the following : 



"The Economic Importance and Food-Habits of American Ceci- 

 domyiidffi," by Dr. E. P. Felt, Albany, N. Y. ; "Observations on the 

 Sorghum Midge in Louisiana," by Mr. E. C. Treherne, Guelph; 

 "Natural Enemies of Some Ontario Coccidee," by Mr. A. Eastham, 

 Guelph; "Parasite Work on the Gypsy and Brown-tail Moths in 

 Massachusetts, ' ' by Mr. W. R. Thompson, Guelph ; and ' ' Some Beetle- 

 haunts," by Mr. F. Morris, Port Hope. 



In his paper on the Cecidomyiidas, Dr. Felt discussed first a number 

 of destructive genera and species, such as the Hessian Fly {Mayetiola 



