790 EXPERIMENT STATION RECORD. 



Mr. TitUH coiuIikU's from his c'xi)eriiients that "tlie usiM)f Hiifiicient licat to destroy 

 effectually insect larvie of the kinds we treated will injure the foliage and often the 

 twigs." Tlie author suggests, however, that this remedy may have a limited field 

 of usi'fulness in the destructi<Mi of San Jose scale, chinch bugs, and other species of 

 injurious insects. 



Carbon bisulphid as an insecticide, J. II. I'.eattie (Agr. Student, W (1004), No. 

 4, pp. i!:i-7 1). — A hrii'f discussion is jiresented of the (themical nature and l)ehavior 

 of carlxtn hisulphid, together with notes on its ai)plication in the destruction of 

 injurious insects, especially in buildings. 



Instructions for the use of carbon bisulphid as an insecticide, H. H. Cousins 

 (/>»/. Ih'pt. A(jr. .hiniairii, ,.' (JH04), No. 1, pp. .9-/..^).— The nature and chemical 

 projH'rties of this insecticide are brielly outlined and instructions are given for using 

 it for destroying insects in the soil, granaries, storehouses, dwellings, etc. 



Potash soaps as insecticides, A. L. Herkera (Com. Parasit. Agr. \_Me.)'iro], Cirr. 

 J, pp. .)). — Brief notes on the composition of different potash soaps, together witli 

 fornuilas for the preparation of emulsions from these soai)sand kerosene and the use 

 of su(^h i-mulsions as insecticides. 



The commercial cultivation of pyrethrum as an insecticide in Southern 

 France and in Algeria, H. Blin [Bui. Sec. Agr. Bahia, ii [1903), No. 4, pp. 

 „'79-:.'S'3). — Notes are given on the cultivation of various species of pyrethrum 

 and on the harvesting and care of the crop in such a manner as tool)tain the greatest 

 insecticide value. The amount of dry powder obtained from each hectare varies 

 from 500 to 900 kg., according to the soil conditions and varieties of pyrethrum cul- 

 tivated. Brief mention is made of the insecticide power of different varieties of 

 pyrethrum. 



A new method of combating insects in houses and granaries, P. Lesne [Jour. 

 Agr. Prot., v. .sry., 6' [I'MS], No. .7.), j)p. S57-Sr,l, Jigx. :.'). — A description is given of 

 an apparatus devised in the United States especially for the disinfection of ships, 

 granaries, and storehouses. In this apparatus sulphur is subjected to a temperature 

 of 600 to 700° C; the gas thus produced is cooled by ])assing through jji pes sur- 

 rounded with cold water. The gas is found to contain traces of SO., along with SOj- 

 The amount of these gases in an atmosphere treated by means of the apparatus 

 described by the author may reach 14 to 15 per cent. When sulphur is burned in 

 the free air the percentage of these gases in the room does not exceed 4 or 5 per 

 cent. The unusual effectiveness of the gas mixture obtained by this a])paratus in 

 the destruction of rats, other injurious mammals, and insects is attributed to the 

 action of SO;,. While the gas mixture is exceedingly destructive to animal life, it 

 appears to be (juite barndess in its effects upon fruits, cereals, grains, and ordinary 

 fabrics. 



The Mediterranean flour moth, (i. 11. ('arpenter {Jonr. Tk})t. Agr. and Tech. 

 Instr. Jreland, S {1908), No. 4, pp. 7L')-7J0, pi. 1) . — The moth is described in its various 

 stages and notes are given on its distribution and life history. The remedies recom- 

 uiendeil for the destruction of the insect are steaming, fumigation with sulphur 

 and with carbon bisulphid. 



The effect of poisons upon Lasius emarginatus, R. Cohelli ( Vcrhondl. K. K. 

 Zoo/. Bat. Uesell. Wieii, 53 {1903), No. 1, pp. lS-21). — Experiments were made in feed- 

 ing this species of ant upon honey containing solutions of various alkaloids. It was 

 found during these experiments that the ants, without showing any symptoms of 

 poisoning, could eat honey containing solutions of atropin, belladonna, cocaine, 

 morphin, opium, codein, pilocarpin, nux vomica, aconite, digitalis, veratrin. col- 

 chicum, strychnin, or Fowler's solution of arsenic. 



Ants, green fly, and scale, Bonavia {Jour. Roy. Hart. Soc. [London'] , 28 {1903) , pt. 

 1-^, pp. 84, 85). — The author discusses the relationship between ants and insects 

 which they attend, such as aphides and scale insects. It is urged that further inves- 



