250 
The Ohio Naturalist. 
[Vol. II, No. 6, 
margin straight, lateral margin very short. Elytra longer than abdomen in 
both sexes, almost parallel-margined ; venation as in osborni, two cross 
nervures between the sectors and the central anteapical cell, divided. 
Color : vertex straw yellow, slightly greenish cast, a pair of approximate, 
triangular spots just behind the apex and a large pair of oval ones inside and 
behind the ocelli. A line across the base of the apical spots would fall in 
front of the oval ones. Scutellum pale yellow, pronotuni and elytra pale 
green, the nervures lighter. Front brownish, with pale arcs. 
Genitalia : female segment a little longer than penultimate, suddenly 
narrowed from near the base, the lateral angles rounding, exposing the 
rounding angles of another membrane, posterior margin roundingly emargi- 
nate, with a triangular median tooth ; male valve transverse, very small ; 
plates together, semicircular, with their apices produced, half longer than 
the ultimate segment, their margins fringed with course hairs. 
Habitat : N. Y., Md. and N. J. Strikingly distinct from any 
other described species. The characters of this and the two pre- 
ceding species are very puzzling and contradictory ; in some 
points they appear closely related, in others not at all. They are 
not very closely related to the others in this group and are only 
placed here for convenience until their larval forms and life- 
histories are known. 
The name simplex is preoccupied in this genus by simplex 
Sahib., of Europe. 
SUBGENUS STIRELEUS NOV. 
Head about as wide as pronotuni, vertex narrow, rarely as 
wide as the long diameter of an eye, usually longer than its basal 
width. Front inflated, almost touching eyes above ; vertex and 
front produced into a long, conical point, their margins indistinct. 
Elytra narrow, about as long as the abdomen ; venation as in 
Athysanus, regular ; ovipositor long and narrow, extending 
beyond the elytra except in ciirtisii. 
Type of subgenus A. bicolor Nan Duzee. 
Key to the Subgenus. 
A. Female ovipositor but little, if at all, exserted, rarely extending beyond 
elytra ; face pale yellow with a fuscous “ Y ” resting on clypeus and 
its arms extending to the eyes, curtisii Fitch. 
AA. Female ovipositor long and narrow, extending beyond pygofers often 
one-fourth its length, usually extending beyond elytra ; face without 
the “ Y.” 
B. Face with a transverse, white band below eyes, occupying all the 
lower half except the apex of clypeus. Anterior margin of 
pronotuni and scutellum, black, bicolor Van Duzee. 
BB. Face unicolorus or with scattered fuscous markings ; pronotuni 
unicolorous or with a row of submarginal spots. 
C. Vertex right-angled, produced in front of eyes and coni- 
cally pointed ; four round, black spots in a square be- 
tween the eyes, obtutus Van Duzee. 
CC. Vertex obtusely rounding, extending but little in front of 
eyes, two large, black spots on anterior margin in female, 
male entirely dark, mexicanus n. sp. 
