14 THE EEPORT OF THE No. 36 



during- tlie past summer was in the neighbourhood of Maniwaki, 83 miles north 

 of Ottawa. Here, in one place, the insects were very abundant and had done 

 much injury to the foliage of spruce. In this particular instance the caterpillars 

 were present all over the trees feeding on the present year's growth, anid in such 

 localities the ends of all the twigs had the characteristic reddish appearance which 

 was noted at the tops of the trees in the outbreaks of the two previous years. By 

 June 14tih, at Maniwaki, the larvae had mostly pupated, but there were still many 

 mature caterpillars to be seen. On this date, also, empty chrysalids were found and 

 moths seen flying. On some of the trees the chrysalids were extremely numerous 

 towards tlie ends of the lower branches, and some were even found attached to 

 the bark of the trunks of the trees. On June 12th many spruce and balsam trees 

 were seen to he attacked along the line of the Canadian Pacific Eailway between 

 Venosta and Low, Que. The same trees had been noticeably attacked near Pour- 

 pore, Que. At Ottawa, in late May, larvae were found feeding on tamarack, and 

 from sjiGcimens gathered which pupated on 1st June the moths emerged on 16th 

 and 17th June. At Maniwaki it was seen that large numbers of the pupa? were 

 parasitized. Dr. Hewitt, however, will have som'etthing to report on our work with 

 the parasites of this insect. In the middle of July large numbers of egg masses 

 were present on trees aM through the Gatineau district and around Ottavv'a. The 

 eggs too were found to be heavily parasitized. On 21st July, on the grounds of the 

 Central Experimental Farm, many egg masses were seen on several kinds of 

 spruces and also on white cedar, all, of course, on the undersides of the leaves. 



The MAPi,E-LEAir CiTTTER. Toward the end of August the Maple-leaf Cutter 

 {Brackenridgia acerifoliella, Fitch) was noticed abundantly on the foliage of hard 

 maples throughout the district. The larvae at this time were in their curious little 

 cases which are formed of four pads cut from the leaves. In 1885 a similar out- 

 break, but more extensive, occurred at Ottawa, and is mentioned by Fletcher in 

 his annual report for that year. On September 2nd of the present year I saw a 

 row of hard maples, near Ottawa, which showed very conspicuously the work of 

 the larvae. At this date many of the cases containing the larvae had fallen from 

 the trees. The winter is passed inside of these little cases and the moth.s emerge 

 the following spring. 



The Elm Bark Louse (Gossyparia spuria, Modeer) occurred abundantly in 

 some sections of the district. On 23rd of May I observed large numbers of the ma- 

 tured females on the branches of some elms near the city. These females, which are 

 reddish and woolliy-covered, are readily seen on the trees in spring and early 

 summer, and it is at this time when the insect is so conspicuous that the trees 

 should be sprayed, if possible, vtdth either kerosene emulsion or whale-oil soap 

 solution. 



The EusTY Tussock Moth (Notolophus aniiqua, L.) Towards the end of 

 July the larvae of this moth were rather numerous at Ottawa, and were especially 

 observed to be doing noticeable injury to spruce trees. Mature larvse were found 

 on spruce on August 4th, and on this date one cocoon was also collected. These cater- 

 pillars, although they occur in the district in more or lees numbers every season, 

 are seldom present in numbers sufficient to do very serious damage. The larvae 

 have a wide range of food plants and may be found on almost any kind of tree 

 or shrub. 



Leaf-roller on Maple (Cenopis pettitana, Eob.). While at Chelsea, Que., 

 on May 27, I noticed that the leaves of many of the hard maples had been rolled 

 and tied by a small green caterpillar with a brownish head and a dark dorsal 



