IOWA ACADEMY OP SCIENCES. 
apical margin of corium 
nearly straight; apical 
angle acute. 
M. Bucculee increasing 
in height caudad, end- 
ing abruptly; lateral 
margin of pronotum 
not explanate; frena 
reaching just to mid 
die of scutellum; ros- 
trum extending a 
little caudad of medi- 
coxae. Hymenarmjs. 
MM. Bucculse elevated in- 
to an angle at cepha- 
lic end, less elevated 
caudad; lateral mar- 
gin of pronotum ex- 
planate cephalad; 
frena reaching be- 
yond middle of scu- 
tellum; rostrum ex- 
tending caudad of 
post-coxae. Menecles. 
KK. Lateral angles of pronotum 
produced into a conspicuous 
spine. Froxijs 
JJ. Veins of membrane simple or 
slightly furcate. 
K. Frena extending beyond 
middle of scutellum. 
L. Tibiae all terete, with- 
out sulcus. 
M. Joint 1 of rostrum 
extending a little 
beyond bucculae. 
Mormidea. 
MM. Joint 1 of rostrum 
shorter than buccu- 
lae. Oebalus. 
^ LL. Tibiae sulcate above. 
