8. _Epilepsy_, which is common among many kinds of birds, may be produced in canaries by particular causes, as great delicacy and timidity. We should therefore avoid alarming them, either by catching them too suddenly or violently, or by tormenting them in any way. They are to be cured as has been already directed in the Introduction. 9. _Overgrown claws and beak._--When the claws or beak want paring, sharp scissors must be used, and care taken to avoid drawing blood, lest the bird should be maimed. They often injure themselves when their claws are too long, and get hooked in the wires of the cage, and continue thus hanging. The females, in the same way, get entangled in their nests. 10. _Lice._--The parasite insects by which these little prisoners are often tormented, are generally produced by slovenliness. Besides frequent bathing, the cages must be cleaned with much care and vigilance, and have plenty of very dry sand strewed over the bottom. These lice, like bugs, retire during the day to cracks and crevices, which accounts for old wooden cages being often infested. To get rid of them, hollow sticks or stalks of rushes are used, which must be examined and changed every day. The plan is good, but by using only tin cages, which may, more easily than any others, be passed through boiling water, the object is more certainly attained. It is rare for canaries which are kept for breeding to live longer than from seven to ten years; while others, if well used, may be preserved for eighteen or twenty years. ATTRACTIVE QUALITIES.--The plumage, pretty form, and docility, the charming familiarity which disposes it to nestle without fear or reserve beside us, as well as its melodious song, have long introduced the canary to all classes of society. Always before our eyes, the object of the most assiduous care, and constant attention, it has afforded a thousand occasions for studying its character, or rather the character and dispositions of the different individuals of its species. It has been discovered that among them, as among quadrupeds, and even man, some individuals are gay and others melancholy; some quarrelsome, others mild; some intelligent, others stupid; some with quick memories, others lazy; some greedy, others frugal; some petulant, others gentle; some ardent, others cold. Its singing, as strong as varied, continues uninterrupted during the year, excepting at the time of moulting, and even this exception is not general. There are some individuals which sing also during the night[58].