292 Annals Entomological Society of America [Vol. VII, 
one-fourth the length, the tips divergent. Length 1 1-8”—1 3-8’; 
cremaster less than one-eighth the total length; girth equal to 
length. 
-THE FAMILY HEMILEUCIDE. 
Margins of the free segments never with a row of spines; the 
body surface never roughened with spines; antennae with the 
stem of the flagellum never distinct, the central axis never set 
with spines, the antennae tapering gradually from the part 
with the greatest width; maxillae measured on the meson never 
more than one-sixth the length of the wings; proleg scars 
seldom prominent on abdominal segments five and six and 
rarely with the anal proleg scars visible; first pair of wings 
with the anal angles broadly rounded, usually at the cephalic 
margin of fourth abdominal segment, and usually reaching 
the caudal margin of the fourth abdominal segment ventrally; 
second pair of wings never produced below the anal angles of 
the first pair of wings and never visible in ventral view; meta- 
thorax never with prominent tubercules; abdominal segments 
5 to 7 with their cephalic margins produced into thick oblique 
flange-like plates directed caudad; cremaster short, never 
bifurcate at tip. 
Altho not usually included with the Hemileucide the genus 
Automeris is placed in this group owing to the very evident 
relation of the pupae to those of the genera Hemileuca and 
Pseudohazis. Morphologically they seem to be more nearly 
related to the Hemileucide, but they are found in cocoons 
like the Saturniide. 
The description of this family is of necessity very incomplete 
owing to lack of material. According to our available knowl- 
edge of the subject the three genera may be separated as 
follows: 
A. Cremaster bearing setae arranged in a transverse row and spreading 
oUub: fam-litees on. 5 vids ete «cee eee Meee peter eee ee mem Pseudohazis 
AA. Cremaster never with setae, either with curved spines or without 
spines or setae of any kind. 
B. Cephalic part of segment above the flange-like plate either smooth 
or with fine longitudinal striations; pupae found in ground. 
Hemileuca 
BB. Cephalic part of segment above the flange-like plate with sharp, 
transverse ridges, deep furrows between; pupae found in cocoons 
Automeris 
