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insect, of which I found the larva-case, is identical with Stephens' 

 T. ephemerceformis. Mr. Gosse, who has been staying some 

 years in Canada, and is going to bring out a book to be called 

 the " Canadian Naturalist," spent the summer of '38 in Ala- 

 bama. He found there plenty of the cocoons, or rather larva- 

 cases, of this insect. All of his specimens were spoiled, but he 

 has a most beautiful drawing of the insect, both $ and 9 , the 

 latter about four tenths of an inch long and one tenth broad. 

 He is going to publish his account of it very soon. My 

 specimen is bad, and therefore cannot fairly be compared with 

 his drawings, but I have some suspicions that it is distinct. 

 He states that his is always found on Pyrus, Crataegus^ Aromia^ 

 or some such genus of shrubs, whilst I always found the cases 

 of mine on Cupressus tkyoides, a species of Ambrosia^ and one 

 or two aromatic plants. In a small box sent from our new 

 colony of South Australia to the Club Cabinet, is another 

 ■species of this genus (?) or group (?), but I have not yet ex- 

 amined it. It has a very hairy body and quite clear wings, the 

 nervures of which struck me as very singular. I will perhaps 

 examine it before I send off this letter. Perhaps Stephens' 

 genus ought to be sunk. I shall look at Horsfield's Javanese 

 collection when next in town ; he has some species of this 

 group. I must confess I see some resemblance between the 

 males of Tliyridopteryx and of Bomhyx mori, yet the larvae are 

 very different. 



I do not know much about Limacodes. Our English species 

 seem to me very distinct from yours; in fact your L. cippus 

 hardly seems to belong to the same genus. On reference 

 to Donovan I see that his figure represents the larva of our 

 Limacodes testudo as exactly like that of a Thecla (nearest to 

 T. nip)1ion Boisd.), but with the margin depressed. The pupa- 

 case is like that of L. pyxidifera. The perfect insect flies 

 swiftly over the underwood about noon, or an hour or two later. 

 I want to get Heterogenea aseUus to compare with some speci- 

 mens from North America which I have called Limacodes. I 



