290 Annals Entomological Society of America _[Vol. VII, 
heart-shaped area at the proximal end with fine longi- 
tudinal ridges, about three-fifths of the remaining length 
finely rugose, the distal end smooth, bifurcate for about one- 
fourth its length, the tips slightly divergent. Length 1 1-8”’— 
114”; cremaster about one-ninth the total length; girth less 
than length. 
Anisota skinneri Biederman. Color dark brown to black; 
antennae with the length three times the greatest breadth, 
a row of minute spines on the central axis of each antenna; 
face parts slightly raised above the level of the appendages, the 
ridge extending cephalad from each proximo-lateral angle of 
the labrum scarcely indicated, a medium sized laciniate spine 
on the face parts near the proximal end of each antenna; 
epicranial area with a long laciniate prominence or ridge, 
which is never horn-like, with a small spinose tubercule caudad 
of it on each side the meson near the proximal end of each 
antenna; labrum variable, usually five-sided, broadly rounded 
or slightly pointed at the distal end; maxillae with the length 
and breadth approximately equal, each half quadrilateral; 
prothorax more densely spinose on each side adjacent to the 
median line; mesothorax without any especially prominent 
spines; metathoracic tubercule strongly elevated, ovate, irregu- 
larly impressed, almost adjacent on the meson, and extending 
half the distance from the meson to the margin of the first pair 
of wings; abdominal segments 1 to 4 with a row of minute, 
closely set spines along both cephalic and caudal margins of 
the segment; cephalic margins of abdominal segments 5 to 7 
dorsad with sharp transverse ridges with distinct furrows 
between and punctate around entire segment, produced into 
flange-like ridges set with spines only about one-eighth the 
length of the segment; abdominal segments 4 to 7 with a dis- 
tinct furrow near the caudal margin of the segment and two 
distinct rows of minute spines between the segment and the 
transverse conjunctiva; eighth abdominal segment with a 
slightly elevated transverse ridge in the middle of the segment 
set with small spines and another row at the caudal margin 
of the segment; ninth abdominal segment with two rows of 
spines at the caudal margin of the segment, some spines slightly 
more prominent at each lateral margin; tenth abdominal 
segment with a small lateral spine on each side the cremaster; 
