284 Annals Entomological Society of America [Vol. VII, 
on the venter; abdominal segments 8 to 10 thickly punctate, 
the eighth segment with a distinct lateral protuberance on 
each side and a prominent tubercule on the meson; ninth and 
tenth segments with some larger spines on the lateral margins; 
cremaster with a smooth V-shaped area on the proximal end 
at dorsum, with the point of the V prolonged down the middle 
of the cremaster, the remainder of the surface irregularly 
rugose and bifurcate at tip for about one-fourth the length, 
the tips divergent. Length 114” to 134”, cremaster one-seventh 
of total length; girth slightly less than length. 
Adelocephala bisecta Lintner. Color dark reddish brown; 
head, thorax and appendages very finely spinose; antennae 
with the length about three times the greatest width, sometimes | 
exceeding this, slightly convex and without prominent spines; 
face parts without prominent ridges or spines; labrum some- 
what six-sided, tuberculate; maxillae with the length greater 
than the breadth, the length measured on meson, one-third 
the length of the wings; thorax without any prominent spines; 
abdominal segments 1 to 8 with rows of minute spines along 
the cephalic and caudal margins of the segments; segments 
9 and 10 with rows of spines near the caudal margins, and 
without any prominent lateral spines; cremaster very rugose, 
bifurcate at tip for less than one-fourth its length, the tips 
but slightly divergent. Length 114” to 134”, the cremaster 
about one-ninth the total length; girth about equal to length. 
Genus Dryocampa Harris. 
Face parts elevated above the level of the appendages; 
body roughened with spines; antennae with a row of prominent 
spines curving caudad on each central axis; eye-pieces both 
present; invaginations for the anterior arms of the tentorium 
small, but distinct; clypeo-labral suture present; labrum 
a little wider than long; maxillae, measured on meson, one- 
fourth the length of the wings, triangular in outline; about 
half the exposed portion of the first pair of legs lying adjacent 
on the meson; tips of the tarsi of the second pair of legs meeting 
obliquely on the meson; median line elevated on prothorax 
and distinct on mesothorax, represented on the cephalic two- 
thirds of the metathorax by a clear elevated area; metathorax 
with a prominently elevated, polished tubercule on each side 
the median elevation, slightly rugose and extending at least 
one-third the distance from the meson to the margin of the 
