338 MODERN CLASSIFICATION OF INSECTS. 
E. Plebeti. — Of small size; larve often short and thick ; subdivided into Rurales, 
or those with dark spots, and Urbicole, or those with pellucid spots. (Syst. 
Nat. tom. ii. p. 744. note.) 
Latreille divides them, in the Régne Animal, from characters taken 
from other parts of the insect, as well as from its preparatory states, 
into two primary, and various secondary, sections, as follows : — 
1. Those which have only one pair of spurs at the extremity of the tibize; the four 
wings are elevated in repose; and the antennz are clavate or filiform. 
a. Those which have the third joint of the labial palpi either rudimental, or, if 
present, clothed with seales, and the claws of the tarsi are large ; caterpil- 
lars nearly cylindrical. 
* The Hexapoda, which have all the feet fit for walking, and nearly alike 
in both sexes; the pupa is girt, as well as attached, by the tail; and 
the central cell of the hind wings is posteriorly closed. Genera Pa- 
pilio, Zelima, and Parnassius, which have the anal edge of the hind 
wings hollowed, or folded; and Pieris (Pontia) and Colias, which 
have the same edge produced under the abdomen, forming a kind of 
gutter. 
** The Tetrapoda have the fore legs evidently shortened, and unfitted for 
walking, either in both sexes or in the females alone; the chrysalis 
is simply suspended. 
+ Those in which the fore legs, although smaller, differ but little in 
form from the others; the central cell of the hind wing is 
closed; and the labial palpi are small. Genera Danais, Eu- 
ploea, Idea, Heliconius, and Acrea, 
++ Those which have the two fore legs strongly folded up, and either 
yisible, but very hairy, or very small and concealed; the hind 
wings have the central cell generally open; the labial palpi are 
larger. Genera Cethosia, Argynnis, Melitzea, Vanessa, Libythea, 
Biblis, Nymphalis, Morpho, Pavonia, Brassolis, Eumenia, Eu-- 
rybia, Hipparchia (Satyrus Latr. ). 
b. Those which have the third joint of the labial palpi naked ; the claws of the 
tarsi are minute; the caterpillars are like wood-lice ; and the chrysalides 
girt, as well as attached at the tail. 
* Those which have the antennz clavate. 
+ Those with the fore legs of the males, at least, much shorter than 
the others. Erycina. 
++ Those with the fore legs alike in both sexes. Myrina, Polyom- 
matus ( Lycena, Thecla). 
** Those with the antenne setaceous, and [slightly] plumose. Genera 
Barbicornis and (but erroneously) Zephyrius. 
2, Those which have the posterior tibiz furnished with two pair of spurs; the two 
hind wings are horizontal in repose; and the antenne are often hooked at the 
tip ; the caterpillars also roll up the leaves, and spin a slender cocoon of silk, 
wherein they are transformed into chrysalides, without angular eminences. 
Genus Hesperia, to which Latreille adds Urania Fab. 
