IOWA ACADEMY OP SCIENCES. 
43 
rounded, lateral angle; rarely juga longer 
than tylus or apex of corium broadly rounded, 
in either case the head only about two-thirds 
as wide as scutellum. (Tribe Pentatomaria.) 
F. Segment 2 of venter unarmed, neither 
spinous nor tuber cul ate on meson. 
G. Odoriferous orifices either far laterad 
of coxae or distinctly elevated or con- 
tinued in a sulcus; head more com- 
monly not strongly bent ventrad, lateral 
margins of juga sometimes narrowly 
reflexed, reflexed portion never greatly 
swollen. 
H. Scutellum with apex broad and 
rounded, lateral margin scarcely con- 
cave at any point; head bent strongly 
ventrad. Cosmopepla. 
HH. Scutellum usually with apex dis- 
tinctly narrowed and lateral margin 
concave toward apex; otherwise the 
head little or only moderately bent 
ventrad. 
I. Odoriferous orifices either without 
a sulcus, or with a sulcus ending 
suddenly, not continuing into a 
gradually disappearing wrinkle. 
J. Veins of membrane irregularly 
anastomosing or irregularly 
furcate or ramose. 
K. Lateral margin of prono- 
tum entire, unarmed ; lateral 
angle rounded, not at all 
produced. 
L. Scutellum broadly 
rounded at apex, as long 
or nearly as long as cor- 
ium; apical margin of 
corium rounded, apical 
angle obtuse. Coenus. 
LL. Scutellum narrowed at 
apex, not extending so 
far caudad as corium; 
