Practical method for the cultivation of mulberry trees, raising of silk worms, cocoons, etc. by Carera Huber & co

Author:Carera, Huber & co. [from old catalog]
Language: eng
Format: epub, pdf
Tags: Mulberry. [from old catalog], Sericulture. [from old catalog]
Publisher: New York, A. Carigliano
Published: 1883-03-25T05:00:00+00:00

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The most diffused, and the most cultivated in Italy is that called the "Quattro Mute," or Four Changes, whose eggs are not capable of development except once a year, and whose cocoons are yellow, white, and green and of other 1 ok)rs blending with all the above.

The life of these insects is divided into five e^jochs, "vvliich are called ages. The first four ages arc readily discerned by the insect changing its skin. During the fifth age the insect begins tlie spinning of the cocoon. IMie silk is derived from the cocoons, which are composed of very slender threads, varying in lengtii from 1,400 to a .600 feet (400 to 500 metres.)

The other two stages of life include only two periods. The first, that of the chrysalis, the second, that of the butterfly; and this last period continues until the two sexes meet t(i reproduce their own s])ecies, by depositing their eggs.

In the stage of larva, the silk - worm breathes by 18 little tubes, or tracheas (wind pipes,) which communicate with the exterior air, l)y as many little holes evenly divided on each side of its body near the feet.

The insect, larva, does not possess sexual organs.

Once the larva begins to feed, it remains immovable, until the moment arri\es for the sjjinning of the ( ocoon. In the state of chrysalis it is apparently dead. Shut up in a cartilaginous vagina, within the cocoon, it possesses no other movement but a lateral one, at the lower end of the body, which shows the only sign of life.

As a butterfly it possesses a respiratory organic system. ( hily one trachea, eyes, sexual organs; and the female, ovaries. The male is possessed of an amorous dis])Osition toward

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