LEPIDOPTERA. — PAPILIONID&. 349 
furnished with recurved points, a pair on each side of the five joints 
following the first, and a single one on each side of the following seg- 
ments. The larva figured by Mad. Marian as that of Pap. Protesilaus, 
has all the characters of one of the Nymphalidae, such as Argynnis. 
The larvae of the Ornithopteri, at least judging from Dr. Horsfield’s 
figure of that of P. Amphrisius (O. Heliacon Bdv.), has the segments 
armed with thick, obtuse, fleshy prominences, and each of the retractile 
nuchal tentacles is enclosed in an external case. 
The species of Papilionides are for the most part tropical; four 
species only are found in Europe, two of which, P. Machaon and 
P. Podalirius, have occurred in England. 
These insects, from the beauty of their colours and large size, 
were styled Equites by Linnzus. Many of the species have the hind 
wings produced into a pair of tails, whence they have obtained the 
name of Swallow-tails. Their flight is rapid. Some of these insects, 
placed by Linnzus in his two sections Equites Trojani and Achivi, 
have been since discovered to be but the sexes of one species; thus 
Mr. MacLeay possesses a specimen, the right side of which is Pap. 
Polycaon,a male Greek, and the left Pap. Laodocus, a female Trojan 
(Linn. Trans. vol. xiv. Append.). An instance of two Greeks thus 
united is described in the Excycl. Méthod., the right side being Pap. 
Ulysses, and the left Pap. Diomedes. 
Doritis Fab. (Parnassius Laér.) is especially interesting, from the 
form of the larva, which has more the appearance of that of one of 
the Bombycidz than of a Papilio Zinn. Its neck is also furnished 
with a retractile tentacle; and the cocoon is enclosed in a loose 
cocoon of leaves fastened together, the chrysalis being apparently 
attached glso by the tail. The females are also furnished with a large 
corneous valve at the anus. The species frequent alpine regions, 
D. Apollo being a reputed British species. 
M. Duponchel has published a notice relative to the genus Thais, 
some individuals of which remained two seasons in the chrysalis state, 
being the only instance on record of such an occurrence amongst the 
butterflies. (Ann. Soc. Ent. de France, 1835, p. 661.) 
The subfamily PreripEs comprising the Danai candidi of Linnzus 
or the families D. and E. (larve medio-striatee and pallidiventris ) 
of the Weiner Verzeichniss ( fig. 96. 1. Mancipium Cardamines), 
is at once distinguished from the preceding by the hind wings 
