[For an account of experiments conducted in England by Dr. Wallace, whichunfortunately were complete failures as far as rearing the moth went, see an essay by that gentleman in _The Transactions of the Entomological Society of London_, 3rd series, vol. v., pt. 5; Longmans and Co. The results of an experiment which give the greatest hopes of success, will be found in "The Entomologist" for October, 1867.--ED.] [Illustration: Fig. 222.--Cocoon of Attacus (Bombyx) Yama-Maï.] [Illustration: Fig. 223.--Attacus (Bombyx) Yama-Maï.] Fig. 221 represents the larva, or caterpillar, two-thirds natural size; Fig. 222, the cocoon, drawn on the same scale; and Fig. 223, the moth. In 1866, M. Camille Personnat published a very interesting monograph of _Yama-Maï_, which may be consulted with profit by both cultivators of silk and naturalists.[66] [66] Le Ver à Soie du Chêne (_Bombyx Yama Maï_), son histoire, sa description, ses moeurs. 8vo., avec planches coloriées. A Laval, à l'école de sériculture. _Attacus pernyi_ yields a remarkably beautiful silk, fine, strong, and brilliant, which can be spun and dyed with great ease. The tissues obtained from it partake of the qualities of ordinary silk, of wool, and of cotton. This species of _Attacus_, which is reared on the oak in Mandchouria, has given rise to great hopes in France. The cocoons and moths of this worm were exhibited for the first time at the Universal Exhibition of 1855. They were reared by M. Jordan, of Lyons, from some cocoons sent over from China by the missionaries. It is much to be desired that this species may be acclimatised in Europe. [Illustration: Fig. 224.--Cocoon of Attacus (Bombyx) pernyi.] Figs. 224 and 225 represent, after drawings in the Memoir of M. Guérin-Méneville, already referred to, the cocoon and moth of the _Attacus pernyi_. The silk which _Attacus Mylitta_ produces is perhaps superior to that of _Pernyi_. When the cocoons are properly prepared, the silk can with ease be wound off from one end of them to the other. This worm is found in various parts of Bengal and of Calcutta, and also at Lahore, and its silk is exported in considerable quantities under the name of _tusseh_. Brownish stuffs are made of it in India of firm and bright texture, which are used for summer clothing, or for covering furniture. [Illustration: Fig. 225.--Attacus (Bombyx) pernyi.] Figs. 226 and 227 represent the moth and the cocoon of _Attacus Mylitta_ after M. Guérin-Méneville. [Illustration: Fig. 226.--Attacus (Bombyx) Mylitta.]