456 EXPERIMENT STATION RECORD. [Vol.36 



power is affected it is probable that the soap is also broken down sufficiently 

 to lose some of its value as an insecticide ; hence, both factors must be con- 

 sidered as the cause of the loss of efficiency of some of the more concentrated 

 mixtures." 



Cyaiiid g'as for the destruction of insects, with special reference to mos- 

 quitoes, fieas, body lice, a,nd bedbugs, R. H. Creel and F. M. Faget {Pub. 

 Health Rpis. [V. .S'.], 31 {1916), No. 23, pp. 1^64-1475) .—FoUowing a review of 

 the literature relating to the subject experiments with cyanid gas and sulphur 

 dioxid are reported in tabular form. 



" Cyanid gas is much cheaper than sulphur dioxid for mosquito destruction, 

 costing only one-seventh as much as the latter gas, aside from requiring a 

 much less duration of exposure. . . . For destroying bedbugs, roaches, and 

 body lice sulphur is a cheaper fumigant than cyanid, but the latter possesses 

 obvious advantages in lessened duration of exposure and noninjurious effect 

 on fabrics, furnishings, merchandise, etc." 



Some effects of freezing arsenate of lead pastes, R. A. Dutcher {Jour. 

 Econ. Ent., 9 {1916), No. 6. pp. 561-566. pis. 3).— The author finds that the 

 settling properties of some commercial samples of lead arsenate paste are 

 affected by freezing while others are not, that the microscopical appearances of 

 all lead arsenate pastes examined were altered, and that the adhesive properties 

 of lead arsenate pastes may be affected by freezing. 



Forty-sixth annual report of the Entomological Society of Ontario, 1915 

 {Ann. Rpt. Ent. 8oc. Ontario, 46 {1915), pp. 232, figs. 65). — This report includes 

 the following papers: 



Insects of the Season in Ontario (pp. 29-33) and The Imported Willow and 

 Poplar Borer or Curculio {Cryptorhynchus Japathi) (pp. 33-40), by L. Caesar; 

 Side Injury and Codling IMoth, by E. P. Felt (pp. 40-43) ; The Home of Oortyna 

 strantcnto.'ta, by A. F. Winn (pp. 43^8) ; Insects of Ste. Anne's, Quebec, Season 

 of 1915 (pp. 48-50) and The Occurrence of Tychius piciroftris on Clover at Ste. 

 Anne's, Quebec (pp. 50-52), by E. M. DuPorte; Observations upon Some of the 

 Predacious and Parasitic Hymenoptera, by Fyles (pp. 52-60) ; The Leaf- weevil 

 {Polydruaus impressijrons) in New York, by P. J. Parrott and H. Glasgow (pp. 

 60-65) ; The Green Apple Bug {Lygus invitvs) in Nova Scotia, by W. H. Brit- 

 tain (pp. 65-78), noted on page 457; A Capsid Attacking Apples {Neurocolpus 

 nuhilus), by H. G. Crawford (pp. 79-88) ; The Founding of the Science of Cecid- 

 ology, by A. Cosens (pp. 88-93) ; The Army Cutworm in Southern Alberta, by 

 E. H. Strickland (pp. 93-97) ; Life Zones in Entomologj' and Their Relation to 

 Crops, by H. T. Fernald (pp. 97-101) ; Some Notes Regarding Nose and Other 

 Botflies, by W. Lochhead (pp. 102-108) ; The Seasonal Prevalence of Hypodermu 

 bovis in 1915, Together with Observations on the Terrifying Effect H. bovis Has 

 Upon Cattle, and Lesions Produced by the Larva, by S. Hadwen (pp. 108-119), 

 noted on page 482; Progress of Entomology in Canada During 1915, by C. G. 

 Hewitt (pp. 119-123) ; The Life History of Chcrmes cooleyi in Stanley Park, 

 Vancouver, B. C, by R. N. Chrystal (pp. 123-130) ; The Cabbage Maggot- 

 Autumn Development in British Columbia {Phorbia brassicoe) (pp. 130-139) 

 and The Cabbage Maggot in British Columbia (P. brassicce) . — The Natural 

 Control by Parasites and Predacious Insects (pp. 140-145), by R. C. Treherne; 

 Some of the Methods Followed in Nova Scotia in Controlling the Brown-tail 

 Moth, by G. E. Sanders (pp. 147-152) ; Observations on the Brown-tail and 

 Gipsy Moth Situation in Relation to Canada, by J. D. Tothill (pp. 152, 153) ; 

 The Work Carried on In the United States Against the Gipsy and Brown-tail 

 Moths, by A. F. Burgess (pp. 153-155) ; Locust Control Work with Poisoned 

 Baits in Eastern Canada in 1915, by A. Gibson (pp. 156-162) ; Leaf Rollers At- 



