314 Mr. F. Moore on the 



and while the one prefers the warmth of summer, the other prefers 

 that of the winter months. Feeds on the mulberry. 



Bomhyx Arracanensis, Hutton. 



Cultivated in Arracan, but is said to have been introduced from 

 China. Yields annually several crops of silk superior tothat pro- 

 duced in Bengal. Larva feeds on the mulberry. 



Bombyx textor, Hutton. 



Inhabits China. 



Cultivated in Italy and France, and produces, when healthy, 

 a pure white silk. It is also cultivated in Bengal, where it does 

 not thrive, and is there called the Boro poloo. Captain Hutton 

 states that there is no apparent difference in the larva of this and 

 B. mori, except in size — this being nearly an inch less — but the 

 form and texture of the cocoon are totally different. Strange to 

 say, aitliough it is only an annual in France, Italy, Bengal and 

 China — with him at Mussooree, it invariably yields a second or 

 autumnal crop, which B. mori never does. Feeds on the mulberry. 



Bombyx rel'igiosce, Heifer. 



inhabits Assam, and known as the Joree. 



Found wild, feeding on the Peepul tree [Ficus religiosa). It is 

 stated to yield a silk, if not superior, yet equal, to that of Bombyx 

 mori. The cocoon shows the finest filament, and has very much 

 lustre. It is exceedingly smooth to the touch, and very different 

 from the cocoon of B. mori. 



Bombyx Huttoni, Westwood. 



This is a wild mountain species, occurring abundantly on the 

 indigenous mulberry trees of the Western Himalaya, from the 

 Ganges to the Sutlej, and probably beyond them. The worm is 

 so intractable that it can only be fed upon the trees in the open air, 

 and experiments made by Captain Hutton at Mussooree have 

 elicited the fact, that apparently little is to be expected from its 

 cultivation, as all attempts to domesticate it have hitherto proved 

 ineffectual. 



A batch of the eggs of this species, which Captain Hutton has 

 recently sent me, are now hatching, but unfortunately my mulberry 

 trees (Morus alba) are not in leaf. 



The larva of this species has long fleshy spines in pairs on 

 every segment. The cocoon is spun in the leaf, which is drawn 

 round it, and the silk is very fine and of a pale yellow tint. 



