LEPIDOPTEBA. 469 



but ft single pair of spurs OP spines to their tibia, which are found on their 

 posterior extremity. Their four wings are raised perpendicularly when at 

 rest. Their antenna are sometimes inflated at the extremity, globuliform, 

 or in a little club truncated and rounded at the summit, and sometimes 

 almost filiform. 



This section includes a great variety of subgenera, and includes the 

 Knights, so called by Linnaeus. Those with red spots on the breast are his 

 Trots or Trojans, and those in which it is wanting, his Jlchivi, or Greeks. 

 The genus Papilio of Linnaeus is now cut up into 28 subgenera, for the 

 details of which see the great edition of this work. 



The second section of the Diurnal Lepidoptera is composed of species 

 in which the posterior tibiae have two pairs of spines, one at their ex- 

 tremity, and the other above; such also is the case in the two following 

 families. The inferior wings are usually horizontal when at rest, and the 

 extremity of their antennae very often forms a strongly hooked point. 



Their caterpillars, of which however but few are yet known, bendleaves 

 together, and spin an extremely thin cocoon of silk (in the cavity), hi which 

 they become chrysalides; the latter are smooth or without angular eleva- 

 tions. They compose two subgenera: 



HE s PERI A, Fab. 



Or the P.pltbd urbicohs of Linnaeus, in which the termination of the an- 

 tennae is distinctly globuliform or clavate-, and the inferior palpi are short, 

 broad, and densely covered with scales anteriorly; and the 



URANIA, Fab: 



Where the antennae, at first filiform, become attenuated or setaceous at 

 the extremity, and where the inferior palpi are elongated and slender, with 

 the second joint strongly compressed, and the last much smaller, almost 

 cylindrical and naked. 



FAMILY II. 

 CREPUSCULARIA. 



In this family, near the origin of the external margin of their in- 

 ferior wings, we observe a rigid squamous seta, in the form of a 

 spine or bristle, which passes into a hook on the under surface of 

 the superior wings, maintaining them, when at rest, in a horizontal 

 or inclined position. This character is also visible in the ensuing 

 family, but the Crepuscularia are distinguished from the latter by 

 their antennae, which form an elongated club, either prismatic or 

 fusiform. 



