INSECTS INJURING OAK-LEAVES. 
143 
to the Study of Insects, on which our description was based.) From 
specimens of P. gloverii it seems to differ in the hind wings being less 
rounded, more produced towards the apex. They ap- 
pear to be of nearly the same size. 
Moth. — Male entirely deep smoky black. Antennae plumose. 
Wiugs ample, closely scaled, rounded and full. Neuration of pri- 
maries : costal nervure simple ; slight, joining the costa before the 
apex : S. c. nervure throwing off first and second s. c. nervules from 
its upper side ou to the costal margin ; third s. c. nervule at the up- 
per extremity of the discal cell furcate, throwing off the fourth s. 
c. nervule from its lower side on to the apex; fifth simple, thrown 
off from a short tr insverse stem on to the external margin ; discal 
cell equilateral, longitudinally cordate, not closed by a true vein, 
but by a vein-like fold depressedly medially augulated; a slight crease in the 
membrane divides the cell into two equal parts, running from the point of angu- 
lation of the fold, closing the cell to the base of the wing; median nervure four 
branched, first median thrown off upon external margin from a point opposite the 
fifth s. c. nervule; internal nervure sending off an augulated nervule from its upper 
side, at about its center, to iuternal angle ; the nervure itself joins the margin before 
the angle, and is straight. The male cocoonet with agglutinated fragments of con- 
iferous plauts, and with the extruded skin of the chrysalis after the escape of the 
male moth, accompanied a number of specimens of this species received from the 
South. Expanse of wings, male 19 mm . Length of body, 7 mm . (Grote and Rob.) 
Fig. 47.— Case of 
Psyche confederate 
(after Grote). 
197. The eight- flapped slug-worm. 
Phobetrum pithecium (Abbot and Smith). 
Order Lepidoptera ; Family Bombycid^e. 
A singular dark-brown short, broad, ovate, flattened caterpillar, with eight long 
tongue-like, slender, fleshy lateral appendages, sometimes feeding ,pn the oak. 
This siugular caterpillar, usually found ou the plum, cherry, and 
apple, changes to a brown moth with very narrow wiugs. In the male 
the antenna) are very broadly pectin- 
ated, and the remarkably long nar- 
row fore wiugs are partly transparent. 
Mr. Lintner has bred it from the oak, 
and Mr. S. Lowell Elliott tells me that 
it is almost exclusively an oak-feeder ? 
though occurriug on the wild cherry 
and chestnut. The following ac- 
count is copied from Mr. Hubbard's 
" Orange Tnse ts." 
This insect receives its name from the curious hairy appeudages which cover the 
back and project from the sides of the larva, and have a backward twist, like locks 
of disheveled hair. These are, in fact, fleshy hooks, covered with feathery, brown 
hairs, among which are longer, black, stinging hairs. The cocoon is almost spherical, 
like that of the Saddle-back caterpillar, and is defended by the hairy appendages 
which the larva in some way contrives to leave upon the outside. These tufts give 
to the bullet-shaped cocoon a very nondescript appearance, and the stinging hairs 
afford a very perfect protection against birds and other insectivorous animals. 
Fig. 48— P. pithecium (after Riley); A. co- 
coon — natural size (after Hubbard). 
