150 Annals Entomological Society of America |Vol. VIII, 
Fifth instar: 
Measurements: Length 8-10 mm.; maximum width 3.5—5 mm. 
Body robust; mottled gray; anterior pronotal process porrect; 
pronotum entirely covering mesonotum dorsally; wing-pads fully devel- 
oped, first and second pads extending about equidistant posteriorly; 
legs mottled. 
Head much deflexed; frontal tuberosities small; eyes brown; ocelli 
white; clypeus distinct. Prothorax well developed and_ strongly 
chitenized; anterior process projecting far forward, cylindrical; meso- 
thorax and metathorax distinct; wing-pads long, wings sometimes 
faintly visible through the pads. Abdomen greatly swollen; double row 
of blunt spines down dorsal line, smaller anteriorly and increasing in size 
toward the posterior end; nine segments distinctly visible; undersurface 
of abdomen greenish-white, in female sometimes showing impression of 
ovipositor. Legs strongly marked with patches of gray-brown; femora 
and tibize pilose; tarsi hghter in color; claws ferruginous. 
Adult—Female: 
Measurements: Length 11 mm.; length including horn 14 mm.; 
width between humeral angles 5.5 mm. 
Gray with indistinct darker irregular markings; porrect cylindrical 
horn, slightly flattened and somewhat darker in color at the tip; tegmina 
hyaline, apex fuscous, almost reaching extremity of dorsal process. 
Head including eyes twice as broad as long, grayish-yellow mottled 
with ferruginous and brown; margins of lore strongly sinuate; clypeus 
pilose; eyes dark brown; ocelli white, nearer to each other than to the 
eyes and situated on a line drawn through center of eyes; beak extending 
to posterior coxze; head very sparingly punctate and sparsely pilose. 
Thorax gray, deeply and densely punctate; median percurrent brown 
line sharpened into a ridge on extremity of horn and at apex of posterior 
process; sides of prothorax roughly and irregularly carinate; horn 
porrect and greatly variable in length, cylindrical except at extreme tip 
where it is flattened laterally; posterior process heavy, tectiform, grad- 
ually acute, almost straight, very slightly decurved and extending just 
beyond apex of tegmina. Tegmina hyaline, apex fuscous, base and 
costal region lightly punctate; under-wings hyaline, two-thirds as long 
as tegmina. Under surface of body gray-brown, pubescent. Legs 
uniform yellow brown; femora thick and smooth; tibiae and tarsi 
densely pilose. 
Male: 
Differs from female in size and markings. Smaller, body somewhat 
less robust; porrect horn usually shorter and tending to curve; tegmina 
equalling apex of posterior process. Color deep chocolate brown; 
porrect horn almost black; apex of posterior process becoming cinnamon 
brown; a wide, brilliant, lemon-yellow longitudinal stripe on each side 
of prothorax, extending from margin half-way to median dorsal line, also 
small patches of yellow on metopidium; head yellow with brown 
patches. Undersurface of abdomen darker than in female. 
