526 



outside the territory at present infested, which has been placed under 

 quarantine. All plant products, as well as stone and quarry products, 

 are inspected before being sent out of the quarantine area. For the 

 past three years inspectors have been stationed at points where long 

 distance trains pass out of the infested territory, in order to examine 

 them and destroy any brown-tail moths that might be attracted to the 

 lights. Large numbers have been killed as a result of these 

 operations. In addition to the parasites, Apaviteles lacteicolor, 

 Compsilura concmTiata and Calosoma si/cophanta, two parasites of gipsy 

 moth eggs, Anastatus bifasciatus and Schedins Jcuvanae, are doing 

 excellent service in the infested areas. 



OiBSON (A.). Locust control work with poisoned baits in eastern 

 Canada in 1915. — 46th Ann. Rept. Entom. Soc. Ontario, 1915, 

 Toronto, 1916, pp. 156-162, 3 figs. [Received 10th October 1916.] 



In 1915, Melanoflus atlantis, Riley (lesser migratory locust) was 

 again very abundant in Ontario and Quebec provinces, Camnula. 

 peUucida, Scudd., being less numerous. New poisoned baits, which 

 had not previously been used in Canada under field conditions, were 

 successfully employed. The results of nine experiments are tabulated 

 with particulars of the crop, infestation, cost, etc. A higher death-rate 

 per square yard was obtained where oranges were used to flavour the 

 bait, one of two such formulae being : — Bran, 20 lb. ; Paris green, 

 ^ lb. ; molasses. 2 qts. ; oranges, 3 ; and water, 2| gals. The second 

 formula is identical, except that the amount of Paris green is doubled. 

 Promising results were obtained with a new and very cheap bait con- 

 taining sawdust instead of bran, viz. : — Sawdust, 20 lb. ; Paris green, 

 -| lb. ; salt, \ lb. ; water, 3 gals. Sawdust, if fairly free from pieces of 

 wood, spreads easily, but in mixing it, care must be taken to add the 

 water slowly, as sawdust does not absorb liquid as quickly as bran 

 does. 



€aesar (L.). Leaf-rollers attacking apples. — 46th Ann. Rept. Entom. 

 Soc. Ontario, 1915, Toronto, 1916, pp. 163-178, 9 figs. [Received 

 10th October 1916.] 



In the course of an investigation into the life-history and habits of 

 €acoecia argyrospila (fruit-tree leaf-roller) in Ontario, C. rosacea'na 

 (oblique-banded leaf-roller) and C. semiferana (box-elder or Manitoba 

 maple leaf-roller) were also found in the same orchard. About nine- 

 tenths of the total injurs' was done by C. argyrospila, which is very 

 abundant in the United States and which cannot be held to be a new 

 pest in Ontario, though it has only become a very destructive one in 

 t^ome orchards in the last two or three years, evidently owing to the 

 absence of natural enemies. Until the last two years, C. rosaceana 

 was considered to be the commonest and most destructive leaf-roller 

 in Ontario, where C. semijerana is very little known. C. argyrospila 

 prefers apple trees, though a few individuals were noticed on pear, 

 plum, peach, and oak. The larvae feed freely upon any succulent weed 

 beneath the trees, and on the leaves and heads of clover and vetch in 

 such positions. C. semiferana does not appear to have been previously 

 recorded as attacking apples. Descriptions are given of the injury done, 



I 



