LEPIDOPTERA. 285 



2. 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), in whicli they become chrysalides; the latter are smooth or 

 without angular elevations. 



These Le])idoptera form tlie Plebei, Urbicolae of Linnaeus, or the 

 Papillons eslropies of Geoffroy, Fabricius united them to Argus 

 by the generic name of Hesperia, but we must also refer to this sec- 

 tion certain exotic Lepidoptera, called pages by the amateurs, of 

 which the original habitat had not hitherto been well ascertained : 

 such are the Uranice of Fabricius. These various Lepidoptera lead 

 to our second family. 



They compose two subgenera : 



Hesperia Fab., 

 Or the P.plebei urbicolce of Linnjcus, in which the termination of 

 the antennae is distinctly globulifonn or clavate, and the inferior palpi 

 are short, broad, and densely covered with scales anteriorly. 



H. malvce,Fa.h.; Roes., Insect. CL, 2, x. Wings dentated, 

 blackish-brown above, spotted and speckled with white, the 

 posterior margin marked with spots of the latter colour ; inferior 

 surface of the wings greenish-grey, with irregular and similar 

 spots. 



The caterpillar is elongated, grey, with a black head, and 

 four yellow points on the neck or first ring, which is narrowed ; 

 a character peculiar to the larvae of this subgenus. It lives on 

 the Malvaceae, bends their leaves together, and there undergoes its 

 metamorphosis. The chrysalis is black, but sprinkled with bluish *. 



Urania, Fab., 

 Where the antennae, at first filiform, become attenuated or seta- 

 ceous at the extremity, and Avhere the inferior palpi are elongated 

 and slender, with the second joint strongly compressed, and the last 

 much smaller, almost cylindrical and naked f . 



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 



* For the other species, see Fab., Entom. Syst., division of the Urbicolce ; Encyc. 

 Method., article Papillon, genus Hespcrie ; and the Hist. Nat. des L^pid. de France 

 of Godart. 



f The Pap. riphceus, leilus, Lavinia, Orontes, Fab. ; Noctua Patroclus, Ejusd. The 

 Urania compose the genera Cydimon, Nyctalamon, and Sematura of Dalman. See 

 his Prodromus of the Monograph of the genus Castnia, p. 26. 



