The Pentatomidae of Nebraska 3 



I. Without the above combination of characters and juga without a lateral 



tooth (Pentatomini) . .2 



2. Segment 2 of the venter unarmed, without median spine or tubercle. .3 

 2. Segment 2 of the venter with a median spine or tubercle projecting 



anteriorly between the hind coxae 18 



3. Odoriferous orifices either far laterad of the coxae or distinctly elevated 

 or continued in a sulcus; head usually not strongly deflexed; 

 lateral margins of the juga sometimes narrowly reflexed, the 



reflexed portions never greatly swollen 4 



3. Odoriferous orifices usually situated just anterior to the lateral border 

 of the hind coxae, without sulcus and scarcely elevated ; head 

 strongly deflexed, front almost vertical, reflexed lateral margins 

 of the juga much swollen; if sulcus is present it is continued 

 laterally in a gradually disappearing wrinkle and the juga are 



no longer than the tylus 17 



4. Sulcus from the odoriferous orifices continued laterally in a gradu- 

 ally disappearing wrinkle; juga longer than the tylus and con- 

 tiguous at their apices Peribalus 



4. Sulcus absent or ending suddenly, not continued laterally in a grad- 

 ually disappearing wrinkle; if the sulcus is absent, the orifices 



are far laterad o f the coxae 5 



5. Lateral margins of the pronotum sometimes with humeral spines or 

 projections but these never bent posteriorly; veins of the mem- 

 brane of the hemelytra simple or slightly furcate or else the 

 lateral margins of the pronotum not conspicuously explanate. . .6 

 5. Lateral margins of the pronotum conspicuously explanate or with a 

 prominent process at lateral angles bent slightly posteriorly; if 

 the margins are explanate, the veins of the hemelytral membrane 



are irregularly furcate or anastomosing 16 



6. Scutellum usually with its apex distinctly narrowed and with its 

 lateral margins concave towards the apex, or else the head but 

 slightly deflexed and not triangular nor noticeably convex dor- 

 sally 7 



6. Scutellum with its apex broad and rounded, and its lateral margins 

 scarcely concave at any point; head strongly deflexed, or trian- 

 gular and dorsally convex in which latter case the juga are 



longer than the tylus 14 



7. Veins of the membrane simple or slightly furcate 8 



7. Veins of the membrane irregularly furcate or anastomosing 13 



8. Frenum not extending beyond the middle of the scutellum 9 



8. Frenum extending beyond the middle of the scutellum 10 



g. Dorsal surface with coarse, black punctures, irregularly arranged, 



especially on the pronotum Trichopepla 



9. Dorsal surface with finer, regularly arranged punctures Carpocoris 



221 



