138 SATTJilNIA ISIS 
cles are replaced by club-like projections of a third 
of an inch in length, and of a bright coral red 
colour. The last segment is furnished with but 
five tubercles, the central one of which is of the 
same clavate form as those on the anterior segment, 
but is of a fine yellow colour. As before stated, 
tliey feed on the leaves of the sassafras, spice- wood, 
and swamp button-wood, and are to be found 
during most of the autumn months. 
" The silk spun by this species is as fine, and is 
])roduced in as great abundance, as that furnished 
by the Bomhyx mori (or the silk-worm usually 
reared for manufacturing purposes, and which was 
originally a native of Asia), but is of a darker 
colour, and will, it is feared, always present diffi- 
culties in reeling, from the manner in which part of 
it is attached to the brancli." 
SATURXIA ISIS, ^V^stwood. 
PLATE XIII. 
On first drawing and describing this fine species, we 
thought that it was quite new, never having seen 
another specimen except one in the possession of 
Samuel Stevens, Esq., from which our drawing was 
made. But we have since learned that a figure 
