HESPERID.E. 109 



below the middle size, and no way distinguished 

 for beauty of colouring or variety of markings. 

 In these respects, indeed, such a general similarity 

 prevails, that in several instances the greatest diffi- 

 culty is experienced in determining the species, and 

 much complexity and confusion is consequently to 

 be found in their synonymy. They formed a part 

 of the fifth great section into which Linne divided 

 the diurnal lepidoptera, and were distinguished in 

 his system by the appellation of Plebeii Urbicolce. 

 The head and thorax are very large and robust, and 

 the wings are thick and strong. The caterpillars 

 of many of the species are imperfectly known. 

 Some of them protect themselves by rolling together 

 the leaves on which they feed, in a manner similar 

 to that practised by the leaf-rolling caterpillars of 

 certain moths. The chrysalides are without any 

 eminence except at the head, which is notched or 

 acuminated, and they are enclosed in a web of loose 

 texture. 



