22 MODERN ARRANGEMENT OF 
are terminated by a club or button, hooked at 
the end; in others they are filiform, with the ex- 
tremity slender, bent, and pointed. 
The genera are Hxsperta and Urania. 
The Hesperides differ in their metamorphosis from that of the 
Papilionides. The caterpillars resemble those of many noctur- 
nal Lepidoptera. They are almost naked, tapering at the two 
extremities, or fusiform, with a globular head. They are found 
between leayes, which they fix together with their silky fila- 
ments. The pup® also resemble those of the nocturnal Lepi- 
doptera. ‘They have no eminences or angular projections, and 
are inclosed in a slight web, and frequently on leayes. 
Genus Hrsrertra, Latreille. 
Antenne terminated in a club ; inferior palpi short, 
consisting of three joints, broad, and provided 
with scales anteriorly ; body short and thick ; 
wings triangular, thick, generally horizontal in 
repose ; abdomen short, nearly conical ; feet 
strong, and the posterior legs with two spines 
more than the others; tarsi terminated by two 
small, simple, and arched hooks. 
This genus is subdivided as follows :— 
* Inferior wings prolonged into a tail. 
** Inferior wings not prolonged. 
Trise I].—_CREPUSCULARIA. 
The exterior border of the lower wings generally 
provided with a strong, pointed, stiff, horny bristle 
near its origin, which enters into a groove below 
