All Kaffir children are neglected, according to Kidd,[45] but on the birth of twins, “one frequently is killed by the father, for the natives think that unless the father places a lump of earth in the mouth of one of the babies, he will lose his strength.” The next provision to keep down the “cost of living” is directed against children with blemishes, a practice that was not easy to check even among civilized peoples. Among the Australian aborigines “it is usual to destroy those that are malformed.”[46] Among certain tribes on the west coast, children whose mothers have died are thrown into the bush, “as are all children who have not arrived in this world in the way considered orthodox or who cut their teeth in an improper way.” A child born with teeth is put to death, in some parts of Africa; children born in stormy weather are destroyed in Kamchatka.[47] In Madagascar “the superstition of lucky and unlucky days prevailed throughout all the tribes, and the unfortunate infants that came into the world on one of these unlucky days were immediately destroyed.”[48] How obvious are the so-called reasons for killing the children may be seen from the fact that according to another authority, the proscribed or unlucky periods and days include all children born in March and April, or in the last week of each month, or on Wednesdays and Fridays.[49] Among the Antankarana tribes of the Amber Mountains in Madagascar, a child that sneezes at or shortly after its birth is exposed. Among the Basuto, when a child is born with its feet first, it is killed,[50] whereas among the Bondei it is killed if it is born head first.[51] Among the Bondei, the excuses found for killing children are many. If the child is born head first, it is a _kigego_ (unlucky child) and is strangled; if it cries, it is a _kigego_ and is strangled. If the father has not been in the _galo_ (kekutoigwa), or the mother has not been in the _kiwanga_ (kekuviniwa) (initiated), the child is a _tumbwi_ (offence) and is strangled.”[52] Mental processes the world over are much the same. The American legislator raising the tariff to keep out competitors is not employing a system entirely dissimilar from that of the barbarians who, finding the first proscriptions fail to keep down the birthrate, widen the scope of the proscription. And so the customary law grows to include female children among the proscribed. Writing in the latter part of the eighteenth century, Don Felix de Azara declared he had found that among the Guanas in South America it was the custom for the women to bury alive the majority of the female children, and that they never brought up more than one boy and one girl.[53]