14 THE REPORT OF THE No. 19 



Prof, J. B. Smith had collected many egg-masses and found none that 

 v.eTe parasitized. In the southern part of the State of New Jersey there were 

 two broods of the insect in the year, but in the northern part only one. The 

 city of Newark is situated on the dividing line between the life-zones, and 

 consequently there are two broods in part of the city and only one in the rest. 

 Ten cents per quart was paid for egg-masses collected, but he considered spray- 

 ing with Paris green a much cheaper method of destruction, as it only cost 

 about ten cents per tree, while egg-collecting came to |2.50 when the attack 

 was severe. The egg-masses he found to contain an average of 200 eggs. 



Dr. Fletcher, in reply to a question as to whether spraying should be 

 discontinued in order to avoid killing the parasites as well as the noxious in- 

 sects, stated that it was much safer to spray and be sure of killing the enemy, 

 especially as there was no certainty regarding the work of the parasites. In 

 answer to a further question, Does spraying kill internal parasites ? he replied. 

 Yes, if it destroys the insect which supplies its parasite with food. On one 

 occasion he had found a number of parasites in egg-masses on trees at the 

 corner of King and Simcoe streets, Toronto. 



In remarking upon Dr. Bethune's paper, he stated that the Codling Moth 

 was one-brooded from Toronto eastward and two-brooded westward. At Ot- 

 tawa, where there is but one brood, spraying in the spring is sufficient for its 

 control, but at London the conditions are quite different. For the Cottony 

 Maple Scale he recommended treatment of the trees in winter with the lime 

 and sulphur wash. White-grubs in lawns may be checked by freely spraying 

 the affected portions with kerosene emulsion and then washing with water. 

 Click-beetles, the parents of Wire-worms, are attracted in large numbers to 

 the bait used at night in sugaring for moths, and might be largely destroyed 

 by this means. It was remarkable that the twelve-spotted Asparagus beetle 

 should have outstripped the other species in its advance westward through 

 Ontario; the latter (C. Asparagi) was spreading very slowly. The Pea-weevil 

 is at present somewhat scarce and therefore now is the time for a successful 

 fight against it. The growers of peas should not pay five times too much for 

 their seed, because peas infested with weevils only contain one-fifth of their 

 proper contents. The seedsmen are now fumigating their peas, because their 

 customers demand seeds that have been treated with bi-sulphide of carbon, — 

 the method is very simple and should be universally adopted. 



Mr. C. W. Nash said that peas should be treated at once after they are 

 harvested, because a large proportion of the weevils emerge from the peas early 

 in October and thus escape fumigation, if it is postponed to a later date. 

 They may be found in immense numbers in barns where peas have been 

 stored. 



Prof. J. B. Smith asked whether the White-grubs referred to by Dr. 

 Bethune were hairy or smooth. On being told that they were smooth and the 

 larvae of May-beetles (Lachnosfervn), he said that at Washington a few years 

 ago a lawn was so badly affected by White-grubs, which ate the roots of the 

 grass, that the turf could be rolled up like a carpet ; there the -grubs were 

 hairy and the larvae of Allorhina nitida (a beetle which does not occur in On- 

 tario). 



In New Jersey they had had a similar experience to that in London with 

 the Cottony Maple Scale, — the city of Plainfield last year was the worst af- 

 fected and the numbers were similar to those described by Dr. Bethune. The 

 large wintering scales of the female he had found abundantly parasitized. A 

 Lady-bird beetle (Hyperaspis) was very numerous and attacked the scales. 



