42 7);-. Roxiuiuiii's Account of 



are derived from the same insect originally, and that they have 

 assumed different habits by different modes of culture or food. 



" When I return from Calcutta I shall make particular inquiries 

 on the subject. 



" You will observe that the inclosed specimen is tinged of a 

 deeper colour than the filament of the cocoon : this they say is 

 from the alkaline ley." 



The same gentleman (Mr. Atkinson) has, since writing the fore- 

 going letters, sent me large supplies of the cocoons of both the 

 Bughy and Jarroo insects, and I have received parcels of them 

 from other quarters. These have all produced their insects; 

 and after minute investigation 1 am not able to observe any 

 difference, except in the size, and that is even trifling, so that 

 I can at most only call them varieties of the same species. But 

 very different is that M'hich lives on the leaves of the Palma 

 Christi plant, a species I am now able to give an account and 

 drawings of, having often reared and conducted them through 

 their various stages in my own room within these three years. 



THE ARRINDY SILK-WORM. 



PHAL7ENA CYNTHIA. 



Drury, 2. t.6.f.2. 

 Cramer, A. t. 39. Jig. A. 

 Antennae pectinated ; no mouth ; wings incumbent, and ex- 

 panded, with their angles rounded : superior pair falcated, with 

 a black eye near the exterior angle. Prevailing colour brownish, 

 with white and ferruginous curved bands ; and an obscure, semi- 

 lunar, subdiaphanous mark near the centre of each. 



This 



