LEPIDOPTERA. 
223 
darker than the female, from which it differs also in having 
a large yellow spot, which nearly covers the outer half of the 
hind wings. This species flies in June and July. As sug¬ 
gested by its name, it infests locust; but its larva also bores 
in the trunks of oak, poplar, willow, and other trees. It 
is supposed that the species requires three years to com¬ 
plete its transformations. 
The Leopard-moth, Zeuzera pyrina (Zeu-ze'ra py-ri'na) 
is a large European species which has become common in 
the vicinity of New York City, and will doubtless spread to 
other parts of the country. It is white, spotted with numer¬ 
ous small black spots. Its larva is very injurious, especially 
to maple. It infests other shade trees, and also apple and 
pear. 
Family EUCLEID^E (Eu-cle'i-dae). 
The Slug-caterpillar Moths . 
One often finds on the leaves of shrubs or trees elliptica) 
or oval larvae that resemble slugs in the form of the body 
and in their gliding motion. As these are larvae of moths 
they have been termed Slug-caterpillars; but they present 
very little similarity in form to other caterpillars. The re¬ 
semblance to slugs is greatly increased by the fact that the 
Fig. 257.—Larva of Eulimacodes scaphci. Fig. 258 ,—Euclea delpkinii , larva. Fig. 259. 
lower surface of the body is closely applied to the object 
upon which the larva is creeping, the pro-legs being replaced 
by mere swellings on the abdominal segments. Some 
species are naked (Fig. 257); but many of them are armed 
