184 EXPERIMENTAL FARMS. 



"March 31. — I send you some more large grubs and somesm:!!! ones that I found 

 with them. A few days ago I was digging up two rows of young plum trees raised 

 from cuttings, and found about one hundred of the large grubs and a large number 

 also of the small ones." 



In July last Mr. Knight also sent me the larvae, chrysalides and a perfect beetle 

 with the following note : " Last week I was forking among the roses and I found 

 about thirty chiysalides. 1 forward you some of them. The grubs are playing 

 havoc again this season." 



This large handsome beetle is 1\ inches in length by over \ inch wide. It is 

 shaped like the ordinaiy June-bug, is of a tawny brown appearance with four white 

 stripes and a short dash from the shoulders on each wing case. The 

 colour of the wing cases is really black, but they are so covered with 

 tawny scales as to give the beetle a brown appearance. The thorax is piceous, 

 bears three longitudinal white stripes and is covered with tawny scales. 

 The whole of the thorax beneath is densely covered with long silky 

 down, which also appears above as a conspicuous tuft between the thorax and 

 the wing cases. Abdomen beneath banded with white. A remarkable character 

 in this genus is that in the antennae of the males, the terminal joint is very 

 much enlarged and curved, in this species finch in length. It consists of seven 

 plates closely apprcssed together. The larva from which this large beetle comes 

 is a formidable enemy. When full-grown and stretched to its full length, it is 2J 

 inches in length, by f inch wide. The body is curved and white. The bead pale 

 chestnut, the mandibles black. Thoracic feet long and slender. When full grown, 

 it forms a iarge cell nearly 3 inches in length by I inch in diameter and changes to 

 a pupa from which the perfect beetle emerges two or three weeks later. I regret to 

 say that for the present, I am unable to suggest any practical remedy. 



Canker-worms, the larvae of two Geometrid moths (Anisopteryx 

 vernata, Peck, and A. pometaria, Harris), were very abundant 

 in the Ottawa district last spring. Only one instance, however, 

 came under my notice of their attacking fruit trees. They were 

 Fig. 25.— Canker-worm 80 abundant in the woods that basswoods (Tilia), ashes, and 

 maples (Acer dasycarpum, Ehrh.) were in some places almost defoliated. In Win- 

 nipeg they were very abundant upon the ash-leaved maples grown as shade trees. 

 Through the commendable efforts of Mr. W. G. Fonseca, of that city, some of the 

 residents were induced to spray their trees with Paris green, and as a consequence 

 many trees were saved. The result of this spraying will also show itself in the 

 future. 



The ISTequndo Plant-louse (Chaitophorus negundinis, Thomas). — For several 

 years complaints have been received from Manitoba of an injurious ])lant-louse upon 

 the ash-leaved maples (Wegundo), but I always failed to obtain specimens until this 

 year, when a letter was received through Mr. S. A. Bedford fi*om Mr. Thomas 

 Partington, town clerk of the town of Selkirk, Man., as follows: — 



" June 9. — I inclose sprig of maple for your inspection. All the maples in the 

 town (and we have hundreds of them planted) are covered with these lice, and we 

 are afraid the trees will be ruined. Will you please advise me what to do. Would 

 spraying with tobacco water do, or smoking smudges made underneath have any 

 effect? Kindly advise us as soon as possible." 



At the same time other specimens were received from the same place, from Mr. 

 A. H. Vaughun. Both of the above were advised to use the ordinary Kerosene 

 emulsion. Subsequently I received the following very satisfactory letter: — 



"July 10. — In re insects on trees, I thank you for your letter and Bulletin 11. 

 We tried the Kerosene emulsion and found it quite effectual. I think 9 parts of 

 water to 1 of emulsion is a little too strong. With 20 gallons of oil and soap and 12 

 times as much water we have sprinkled and saved many hundreds of large trees." — 

 Thomas Partington, Town Clerk, Selkirk, Man. 



