224 
THE STUDY OF INSECTS. 
with branching spines (Fig. 258). The larvae when full 
grown spin very dense cocoons of brown silk ; these are 
egg-shaped or nearly spherical (Fig. 259), and are usually 
spun between leaves. 
The moths are of medium or small size; they vary 
greatly in appearance, 
11 and many of them air.* 
ni 5 very prettily colored. 
Considerable variation 
exists in the venation of 
the wings in this family 
(Figs. 260, 261). The 
base of vein V may be 
preserved or wanting. In 
some species it is forked 
within the discal cell, in 
others not. There is also 
considerable variation in 
the coalescence of the 
branches of radius, but 
veins III 8 and III 4 co¬ 
alesce to a greater ex¬ 
tent than any other 
branches of this vein, and there is no accessory cell. 
The Skiff Caterpillar, Etilimacodes scapha (Eu-lim-a-co'des 
sca'pha).—This remarkable larva (Fig. 257) is not uncommon 
on oak and other forest trees. It is pale apple-green, with a 
chestnut-brown patch on its back. The moth (Fig. 262) is 
light cinnamon-brown, with a tan-brown triangular spot on 
each fore wing. 
The Spiny Oak-slug, Enclea delphinii (Eu'cle-a del- 
phin'i-i).—This larva (Fig. 258) is one of the most common 
of our slug-caterpillars. It feeds on the leaves of oak, 
pear, willow, and other trees. The moth is cinnamon- 
brown, with a variable number of bright green spots on the 
fore wings (Fig. 263). 
VIII 
Fig. 260.—Wings of Adoneta spinuloides . 
