LEPIDOPTERA. 387 



related to it, is given by the venerable Rumphius, in bis " Herbarium 

 Amboinense," vol. III. p. 113, pi. 75, who discovered the larva in 

 Amboina feeding on the Mangium caseolare rubrum (Itizophora 

 caseolaris, Linn.), a plant of the order of Terebintacese. The 

 figures of the larva and cocoon on Rumphius' s plate show its close 

 affinity to the Anih. Paphia. After describing the larva and 

 pupa, he continues, " postquam tales folliculos per trium septiman- 

 arum spatium servaveram, tarn ex devoluto quam ex integro papilio 

 exit, qui ex pulcherrimis et maximis erat, quos unquam conspexi, qui 

 ad superiorem corporis partem sese demordens aperit, simulque 

 secum flavescentis serici floccum educit, atque hoc semper per noctem 

 peragit. Ejus corpus est, uti reliquorum papilionum, coloris squallide 

 flavi, binosque digiti articulos longum, ad caput vero bina gerit 

 cornicula plumacea, coloris aurantii : Quatuor magnas habet alas, 

 quarum binse exteriores maxima? sunt digitum circiter longse, coloris 

 aurantii, sed stria transversalis purpurea per illas decurrit, atque 

 quaevis ala in ejus medio oculum quasi gerit fenestratum, qui circulo 

 purpureo circumductus est et instar vitri pellueidus." 



Dr. Roxburgh (the next author) states this to be the Bughy of the 

 natives of the Burbhoom hills, where the silk which the same people 

 call Tusseh is manufactured. A native of Bengal, Bahar, Assam, &c. 

 Feeds upon the leaves of Rhamnus jujuba (Byer of the Hindoos), 

 and of Terminalia alata glabra, Roxb. (Asseen of the Hindoos). 



They are found in such abundance over many parts of Bengal and 

 the adjoining provinces, as to have afforded to the natives, from time 

 immemorial, an abundant supply of a most durable, coarse, dark- 

 coloured silk, commonly called Tusseh silk, which is woven into a 

 kind of cloth called Tusseh-doot'hies, much worn by Brahmins and 

 other sects of Hindoos. 



Eggs white, which hatch in from two to four weeks. The larva? 

 acquire their full size, which is about four inches in length, and three 

 in circumference, in about six weeks. When the larvae approach their 

 full size, they are too heavy to crawl in search of their food with the 

 back up, as is usual with most caterpillars, but traverse the branch 

 suspended by the feet. "When the larva? are ready to spin the cocoon, 

 each of them connects, by means of the recent glutinous filament of 

 which the cocoon is made, two or three leaves into an exterior enve- 

 lope, which serves as a basis to spin the complete cocoon in ; besides, 

 the cocoon is suspended from a branch of the tree by a thick, strong 

 consolidated cord. The cocoon is of an exact oval shape, and exceed- 

 ingly firm texture, The chrysalis remains dormant for about nine 



