As to the dose of the remedy, that depends on the age of the patient and the development of the disease. They give, to an adult, immediately after the bite, from two to three beetles; to a child, from one to two; to a person in whom the disease has already declared itself, from four to five. Given to a person in good health, the remedy, however, would not be the least dangerous. In cases in which the symptoms of hydrophobia show themselves some days after the employment of the remedy, they recommence the treatment. They have also tried to prepare this remedy with insects collected not in their larvæ but in the imago state, by catching them on flowers, and it seems that these attempts have succeeded. According to M. Bogdanoff, in many governorships of the south of Russia the lovers of sporting are in the habit of making their dogs from time to time swallow (as a preservative) half of a _Cetonia_ with bread or a little wine. Every one in those countries is persuaded of the efficacy of this means for stopping the development of the disease. One ought not, perhaps, to reject a belief so widespread and deeply rooted without some experiments to guarantee us in doing so, for medicine does not yet possess any remedy against hydrophobia: it might not then be useless to try this. Two smaller species than the rose beetle, the _Cetonia stictica_ and the _Cetonia hirtella_, which has yellowish hairs, live on the flowers of thistles. Western Africa, the Cape, Madagascar, &c., are very rich in species of _Cetoniæ_. Among the _Cetoniadæ_ is the genus _Goliathus_, gigantic insects which inhabit Africa. Their total length sometimes attains from three to five inches. Their colours are generally a dull white or yellow, which has nothing metallic about it, with spots of a velvety black--these are due to a sort of down of an extreme thinness, and which very easily comes off. The head of these enormous Coleoptera is generally cut or scooped out, and is adorned sometimes with one or two horns. Their legs, strong and robust, are armed with spurs, and sometimes present on their exterior sharp indentations, which give to these insects a crabbed physiognomy, which their inoffensive habits are far from justifying. All these horns, and all these teeth, which look so terrible, are nothing, in fact, with a great number of these insects, but simple ornaments. They compose the picturesque uniform of the males. They are equivalent to the bear-skin caps, the flaming helmets, and the bullion-fringed epaulettes of our soldiers. The dress of the female _Goliathus_ is much more modest, as is becoming to the sex. We here represent the _Goliathus Derbyana_ (Fig. 426) and Polyphemus (Fig. 427).