8 pairs of skinny abdominal prolegs (pl) projecting
ventrally and ending in a tuft of clawlike spines;
Antennae not forked and shorter than length of head

7 pairs of broad abdominal prolegs (pl) projecting
ventrolaterally the ends of which are encircled by
a few transverse rows of hooked spinules;
Antennae (ant) forked and longer than length of head