409 



aphis) is troublesome in old orchards. It is best to plant only trees 

 grafted on Northern Spy or Majetin stocks, since these are immime 

 to attack. Spraying with red oil emulsion in the winter or tobacco 

 wash in the summer, is effective, but the spray must be applied at 

 high pressure. Mussel scale {Lepidosaphes) causes serious damage. 

 Spraying with red oil emulsion in winter and lime-sulphur in summer 

 has proved satisfactory. The bark should be scraped before spraying, 

 as the scales collect under loose pieces of it. 



Jarvis (E.). Monthly Report of Acting Entomologist to Bureau of 

 Sugar Experiment Stations. — Queensland Agric. Jl, Brisbane, iii, 

 no. 3, March 1915, pp. 115-117. 



Definite results have been obtained conclusively proving that 

 Lejndiota albohirta (the grey-backed cane-beetle) is strongly attracted 

 by white light. On three successive evenings, beginning 14th 

 December, a total of 170 beetles were caught, 131 being males. An 

 acetylene burner of 28 Utres capacity, in a specially designed beetle- 

 trap, was placed facing the centre of the field with the object of 

 attracting beetles that might be emerging among the cane. Recent 

 experimental work with the Samoan fmigus, Metarrhizium anisopliae, 

 has resulted in a 50 per cent, infection of grubs of Lepidiota rothei 

 (the cane-beetle) after twenty-eight days, the first larva being killed 

 nine days after infection and others succumbing a fortnight later. 

 Adults of four additional species of Lepidoptera, not hitherto recorded 

 on sugar-cane, have been reared from larvae. Three of these are 

 Hesperids, while the fourth is a moth-borer, not yet identified, which 

 was observed tunnelling the centre of young shoots of ratoon cane, 

 occasioning injury identical with that caused by the Noctuid, Phrag- 

 matiphila truncata, Wlk. 



NiCHOLLS (H. M.). The Saw-Toothed Grain Beetle, Silvanus surina- 

 mensis, Linn. — Agric. Gaz. Tasmania, Hobart, xxiii, no. 3, March 

 1915, pp. 87-90, 2 figs. 



Silvanus surinamensis, the saw-toothed grain beetle, lives upon 

 stored food-stuffs. A suitable poison-bait can be made up of arsenic 

 1 part, sugar 2 parts, flour 6 parts and water. In bams which are 

 sufficiently air-tight, fumigation should be carried out as soon as the 

 beetles appear ; if potassium cyanide and sulphuric acid are used, 

 fumigation should be continued for 24 hours. Carbon bisulphide can 

 bemused on materials intended for human consumption, 10 lb. being 

 required for 1,000 cubic feet. The beetles are very sensitive to 

 extremes of temperature ; in America, a temperature of 125° F. is 

 applied by means of steam-pipes for the destruction of the insects in 

 flour-mills. Kerosene emulsion, consisting of 1 gal. kerosene, \\ lb. 

 soft soap, and 10 gals, water, or crude carbolic acid, are valuable 

 spraying solutions for stables, etc. 



