The amateur entomologist and the nature-student will observe that the flies which pester the gardener at work are mainly other than the common house-fly. The reader, nevertheless, will like to know if something more cannot be done to stable manure for exterminating maggots, whether of house-flies or the many various filth flies, already hatched and growing therein. Well, "something" indeed can be done by the use of some insecticide. Hitherto chloride of lime has been employed, but the most approved insecticide for the purpose is a solution of iron sulphate—two pounds in one gallon of water; this is said not to deteriorate the horticultural value of stable manure. However, in fine weather, the spreading out and drying of freshly received manure practically rids it of fly maggots, which cannot survive this simple procedure. The mere burial of fly-blown dung and stable litter without prior treatment is quite inefficient. Insanitary heaps of neglected manure, which terribly swarm with maggots, much deteriorate in horticultural value. Farmyards and the scattered dwellings of rural districts remain to be considered, and no doubt herein the difficulty is great, but not hopeless. The latter will be persuaded to follow suit when the good effects of town and suburban policy become apparent. Something more than usual is desirable for the protection of cattle from the breeze and the œstrid flies at midsummer. The latter, at all events, could be easily exterminated by giving butterfly nets and encouragement to children, who would enjoy the fun. Although the close approach of strangers may alarm grazing animals, after the latter have galloped away a very good chance will occur of capturing the slow flying gravid female worble-fly with a butterfly net, or of felling her to the ground with a suitable instrument; if missed on the first attempt, other chances can be got again and again by waiting until the said same fly has returned to threaten her intended victims. The writer has often succeeded in felling the slow flying gravid female worble-fly with a mere walking stick. It is strange that no farmers' entomological friend has hitherto suggested so common-sense a remedy as butterfly nets, which should be of a dark green colour. A company of our popular boy scouts, marching in a skirmishing line on an August Bank Holiday (or a preceding Saturday), over ground where grazing animals are observed showing behaviour conspicuously indicative of attacks by œstrid flies, would enjoy doing grandly useful execution. Every capture should be substantially rewarded.