Note 7 — Social and Domestic Life

Eri silk culture. One of the chief industries, a very profitable one among the Kacháris, is that of the culture of the silk-worm known as eri, and the manufacture of the eri cloth. The eri cocoons, which are about 2½ or 3 inches in length, may often be seen suspended, a few feet from the ground, in long festoons, a thin cord being passed through the base of the cocoons for this purpose. In this condition the cocoons remain for some fifteen days, at the end of which period the insects make their appearance in the butterfly stage. Before they are able to fly away, they are collected with care and placed in a suitable receptacle; and at the end of three or four days eggs resembling sago-grains make their appearance in great numbers. It is said that one insect can on an average produce from eighty to one hundred such eggs, or even more. In a further period of fifteen days the eggs are duly hatched, the new-born insect being at first almost black, from which colour it passes to brown, and finally to white, at intervals of three or four days; and at each change of colour the worm is said to cast its skin in snake-like fashion. Some four days after the last stage is reached, i.e., about fifteen days after being hatched, the insect may be expected to set about the formation of its cocoon. To assist it in this work, small bundles of plantain or mango leaves are loosely tied together and placed within broad baskets or on bamboo platforms, and the insects are then carefully placed within these bundles; and under favourable conditions the cocoon should be fully formed in about twenty-four hours. The actual formation of the cocoon is preceded by certain signs, very significant to the Kachári, i.e., the insect itself refuses food for a short time beforehand and becomes of a light, brilliant colour; and on handling it gently, a soft, rustling sound, proceeding from the insect itself, can be distinctly heard. After being carefully cleaned in water and dried in the sun, the cocoons are stowed away, usually in an earthenware vessel, until a fitting time, generally in the dry, cold season, appears for reeling them off, a work carried out by women and girls. It is said that a Kachári, working steadily at this occupation, can on an average reel off some 150 or 200 cocoons in a day. During the fifteen days preceding the formation of the cocoon, the insects’ quarters must be kept scrupulously clean, and food carefully and regularly provided. Its favourite viand is the eri (castor oil) plant,7 which gives its name alike to the insect itself as well as to the silk prepared from its cocoons. But it also feeds freely on the leaves of certain trees known in Assamese as Kurungá, Gámári and Sangla, especially the first named of the three.