Isigonus informs us, that the Cyrni, a people of India, live to their four hundredth year; and he is of opinion that the same is the case also with the Æthiopian Macrobii,[918] the Seræ, and the inhabitants of Mount Athos.[919] In the case of these last, it is supposed to be owing to the flesh of vipers, which they use as food;[920] in consequence of which, they are free also from all noxious animals, both in their hair and their garments. According to Onesicritus, in those parts of India where there is no shadow,[921] the bodies of men attain a height of five cubits and two palms,[922] and their life is prolonged to one hundred and thirty years; they die without any symptoms of old age, and just as if they were in the middle period of life. Crates of Pergamus calls the Indians, whose age exceeds one hundred years, by the name of Gymnetæ;[923] but not a few authors style them Macrobii. Ctesias mentions a tribe of them, known by the name of Pandore, whose locality is in the valleys, and who live to their two hundredth year; their hair is white in youth, and becomes black in old age.[924] On the other hand, there are some people joining up to the country of the Macrobii, who never live beyond their fortieth year, and their females have children once only during their lives. This circumstance is also mentioned by Agatharchides, who states, in addition, that they live[925] on locusts,[926] and are very swift of foot. Clitarchus and Megasthenes give these people the name of Mandi, and enumerate as many as three hundred villages which belong to them. Their women are capable of bearing children in the seventh year of their age, and become old at forty.[927] Artemidorus states that in the island of Taprobane,[928] life is prolonged to an extreme length, while, at the same time, the body is exempt from weakness. According to Durisis, some of the Indians have connection with beasts, and from this union a mixture of half man, half beast, is produced.[929] Among the Calingæ, a nation also of India, the women conceive at five years of age, and do not live beyond their eighth year.[930] In other places again, there are men born with long hairy tails,[931] and of remarkable swiftness of foot; while there are others that have ears so large as to cover the whole body.[932] The Oritæ are divided from the Indians by the river Arabis;[933] they are acquainted with no food whatever except fish, which they are in the habit of tearing to pieces with their nails, and drying in the sun.[934] Crates of Pergamus states, that the Troglodytæ, who dwell beyond Æthiopia, are able to outrun the horse; and that a tribe of the Æthiopians, who are known as the Syrbotæ, exceed eight cubits in height.