LEPIDOPTERA. 187 
Urania, Fab. 
Where the antennz, 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(1). 
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, maintaining them, when 
at rest, in a horizontal or inclined position(2). This cha- 
racter is also visible in the ensuing family, but the Crepuscu- 
laria are distinguished from the latter by their antennz, which 
form an elongated club, either prismatic or fusiform. 
The caterpillars have always sixteen feet. ‘The chrysa- 
lides 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 some 
body. These Lepidoptera frequently appear only in the 
“morning or evening. 
They compose the genus 
Spuinx, Lin.—Papillons-Bourdons, De Geer, 
So named from the attitude of several of the caterpillars, which 
resembles that of the fabled monster so called. They have received 
Encyc. Méthod., article Papillon, genus Hespérie; and the Hist. Nat. des Lépid. 
de France of Godart. 
(1) The Pap. riphzus, leilus, Lavinia, Orontes, Fab.; Noctua Patroclus, ejusd. 
The Uraniz compose the genera Cydimon, Nyctalamon and Sematura of Dalman. 
See his Prodromus of the Monograph of the genus Castnia, p. 26. 
(2) In certain Smerinthi, however, according to Godart, they are wanting. 
