148 



In Saskatchewan the campaign was organised on a semi-mihtary 

 basis, so directed as to secure the action of farmers in all the affected 

 districts. Supplies furnished within the municipality amounted to 

 2,720 tons of bran, 225 tons of sawdust, 112,636 gallons of molasses, 

 2,805 cases of lemons, 166 tons of arsenic, 34 tons of Paris green, 

 and one barrel of amyl-acetate. The total cost, including transport, 

 amounted to over £67,000 at par. It was estimated that 1,400,000 

 acres of crop were actually saved by the measures taken. 



In Manitoba each municipality worked as a unit. Mixing stations, 

 where farmers could obtain the poisoned bait readily, were established 

 in the towns. Each farmer was responsible for the treatment of his 

 own land and the adjoining side of the road. Waste places were dealt 

 with by the councils. The Manitoba Government bore the cost of 

 materials ; the local councils provided for mixing and distribution. 

 The poisoned bait distributed amounted to 1,659,100 tons. The crops 

 saved by the treatment were valued at over £3,400,000 at par. 



Over the United States border in North Dakota outbreaks occurred in 

 some of the counties adjoining Saskatchewan. No organised control 

 work was carried out, and the loss sustained was estimated at 16 per 

 cent, of a total area of 300,000 acres. It was thought that 58 per 

 cent, of the grasshoppers in the adjoining counties migrated to 

 Canada. Control work will be put into effect in North Dakota in 1921. 



During the campaign in Canada the co-operation of the federal 

 officials was valuable, and experiments were conducted by the Ento- 

 mological Branch with new poisoned baits, dusts, contact sprays 

 and poison gas. 



Another serious outbreak of grasshoppers is expected in 1921, 

 and a representative commiittee has been appointed to devise definite 

 co-operative plans against them. 



Merrit Hawkes (O. a.). Observations on the Life-history, Biology, 



and Genetics of the Lady-bird Beetle, Adalia hipiindata 



((Mulsant). — Proc. Zool. Soc, 1920, London, pt. 4, December 1920, 



pp. 475-490. 



The different varieties of Adalia hipunctata and the possibihty of 



breeding and cross-breeding it are discussed. This Coccinellid feeds 



on nearly ah species of Aphids, and its method of attacking its prey is 



described. The natural enemies of A. hipunctata include various 



birds, Mantis religiosa, and a bug, Podisus serieventris. 



Flint {W. P.). Further Tests of Dry Sulphur Compounds for the 

 Control of San Jose Scale. — Bull. Illinois Nat. Hist. Survey, 

 Urbana, xiii, Article xiii, November 1920, pp. 339-343. 



During 1919 and 1920 many tests have been made in IlHnois 

 orchards to determine the value of various commercial dr^^ sulphur 

 compounds in the control of San Jose scale [Aspidiotus perniciosus]. 

 These dry sulphurs ha^•c several advantages over the commercial lime- 

 sulphur solutions for orchard use, being easier to transport and handle, 

 and also unaffected by frost. The materials used, the time and 

 method of application, and the results are all shown in tables. Con- 

 sistently good results were obtained throughout with 15 lb. Dow dry 

 lime-sulphur to 50 U.S. gals, of water. Martin-Senour's dry lime- 

 sulphur, tested only in the strength 12| lb. to 50 U.S. gals., gave poor 

 results, and it is evident that these materials should not be used 

 at a strength less than 15 lb. per 50 U.S. gals. 



