438 INSECTA. 



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 

 Troes or Trojans, and those in which it is wanting, his Acfiivi, or Greeks. 

 The genus Papilio of Linmuus is now divided into twenty-eight subgenera. 



The second section of the Diurnal Lepidoptera is composed of species in 

 which the posterior tibiae have two pairs of spines, one at their extremity, 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, bend leaves 

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

 they become chrysalides ; the latter are smooth or without angular elevations. 

 They compose two subgenera: 



HESPERIA, Fabricius, 



Or, the P. plebei urbicola: of Linnsus, in which the termination of the 

 antenna? is distinctly globuliform or clavate, and the inferior palpi are short, 

 broad, and densely covered with scales anteriorly ; and the 



URANIA, Fabricius, 



Where the antenna, 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 cylin- 

 drical and naked. 



FAMILY II. 



CREPUSCULARIA. 



IN this family, near the origin of the external margin of their inferior 

 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, main- 

 taining 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 antenna-, which form an elongated club, either pris- 

 matic or fusiform. 



The caterpillars have always sixteen feet. The chrysalides are destitute of 

 the points or angles observed in most of those of the diurnal Lepidoptera, and 

 are usually enclosed in a cocoon, or concealed either in the earth or under 

 Borne body. These Lepidoptera frequently appear only in the morning or 

 evening. They compose the genus 



SPHINX, Linnceiis, 



So named from the attitude of several of the caterpillars, which resembles that 

 of the fabled monster so called. 



