300 Annals Entomological Society of America  [Vol. VII, 
median thoracic line very narrow, only distinct on the meso- 
thorax; abdominal segments 5 to 7 with the cephalic margin 
ridged, produced into an oblique flange-like plate with an 
undulate margin having prominent curves dorsad of the spiracu- 
lar line, the median line of cephalic margin indicated by oblique 
ridges, a slightly raised, smooth line cephalad of the junction 
‘of the segment and the transverse conjunctiva; tenth abdominal 
segment having the dorsal and lateral margins of the cre- 
’ master with semi-longitudinal ridges at base of cremaster; 
cremaster at least two millimeters in length, triangular in out- 
line, tapering rapidly to a pointed tip with a transverse row of 
sharply recurved spines, the tips curving dorsad. Length, 
abdomen expanded, 114”—1 5-8"; girth about 134”. 
Automeris incarnata Walker. Color dark brown to blackish, 
transverse conjunctiva lighter; body setae light brown, incon- 
spicuous; face parts and appendages with wavy, indeterminate, 
transverse striations,. exposed surface of thorax tuberculate 
with blunt, conical projections; antennae in both sexes with 
length about four times the width and ending opposite the tips 
of the first pair of legs; labrum variable, broader than long, 
usually five-sided, pointed at distal end; maxillae, measured on 
meson, about one-sixth the length of the wings, median length 
less than the greatest width, each half quadrilateral, lateral 
margins concave, basal half sculptured and roughened; median 
thoracic line wanting except on metathorax; dorsal and lateral 
portions of cephalic margins of abdominal segments 5 to 7 
with fine, sharp, transverse ridges becoming indistinct in the 
region of the proleg scars, the cephalic margin narrower in this 
region and produced all around segment into a very narrow, 
flange-like plate with a distinct longitudinal impression at 
meson; abdominal segments 4 to 7 with a raised line cephalad 
of the line between the segment and the transverse conjunctiva; 
tenth abdominal segment rugose at base of cremaster; the 
cremaster short, rounded, constricted at base and set with a 
small group of closely set, sharply recurved spines, the tips 
turning outward in all directions. Length, abdomen con- 
tracted, about 1”, expanded, about 1 1-8”; girth about 114”. 
