26 INTRODUCTION. 



diversified in form ; but there is one character which exists in all the varieties, 

 from which it has been named Cuspidata : this consists in one or more points, or 

 lengthened tubercles, either at the extremity of the abdomen or on one of the 

 sections of the body. I have not ascertained whether all these various forms consti- 

 tute a connected circle, but their analysis will follow in the course of the work. 

 The typical genera are Cerura of Schrank and Stauropus of Germar, but the stirps 

 also embraces Notodonta, at least in part, and Aglia and Endromis of Ochsenheimer, 

 and the genus Bomhyx as defined by Schrank. 



The families R, S, and T, of the W. V., p. 62, 63, and 64, most properly 

 named, according to the larva, Gibhosce, Furcates, and Cuspidatce, and part of 

 Fam. A, Larvce Sphingiformes, comprising the Bombyx Mori, belong to this stirps : 

 the latter appears to be connected in affinity with the stirps first enumerated ; but 

 as it is not my intention to trace the circular disposition of this tribe at present, I 

 have only transiently indicated several of the most obvious affinities. 



The agreement between the forms of larva; which I have discovered in Java, 

 and those described in the Wiener Verzeichnis is so striking in the tribe of Bom- 

 bycidae, that I am induced to give in this place an enumeration of the families into 

 which the section of Bombyces or Spinner has been divided, as they will illustrate 

 most of the forms which will be described in the sequel. With one or two exceptions, 

 the same forms of larvse have, in this tribe, been observed in Europe and in Java. 

 The names employed are so characteristic, that I have selected from them those 

 which indicate the stirpes. 



The families are the following, viz^ 



Fam. A. Earvce Sphingiformes. Fam. B. Larv^ Verticillat^. Fam. C. Larv^ 

 Tuherosce. Fam. D. Larvce Nodosce. Fam. E. Larva; Ursince. Fam. F. Larvce 

 Celeripedes. Fam. G. Larvje Fasciculate. Fam. H. Larvce Cristatce. Fam. I. 

 Larva; CoUarice. Fam. K. Larva; Villosce. Fam. L. Larve Piloses. Fam. M. Larva; 

 Subpilosa;. Fam. N. Larvae Lignivore. Fam. O. Larvce Radicivorce. Fam. P. 

 Larvce Noctuiformes. Fam. Q. Larvce Geometriformes. Fam. R. Larvce Gibbosce. 

 Fam. S. Larvce Furcatce. Fam. T. Larvje Cuspidate. Fam. V. Larvce Limaci- 

 formes. 



They naturally resolve themselves, according to the views adopted in this work, 

 into the following Stirpes, viz. 



BoMBYCIDjE. 



