~] 
10. 
SCUTELLEROIDEA OF IOWA 61 
margins of juga not or only slightly reflexed, not much 
thickened ; head usually not strongly deflexed........... 3 
Scutellum broad and rounded at apex, the lateral margins 
almost straight; head bent strongly downwards 
Cosmopepla (11) 
Seutellum usually distinctly narrowed at apex, the lateral 
margins concave; head not or only slightly deflexed..... + 
Odoriferous orifices elevated, with a suleus continued lat- 
erally in a gradually disappearing wrinkle............. D 
Odoriferous orifices not elevated, the suleus absent or end- 
ing abruptly and not continued laterally in a gradually 
GSN Oe ATMO WHIM KIC 72 ee er went ele 6 Cinna 6 
juca noe longer than tylus.....00:.........- Thyanta (14) 
Juga longer than tylus and almost or quite contiguous 
ED USICUOTE Se tis cates Mette ala eR SU tera ae acer Perrbalus (1) 
Veins of membrane irregularly anastomosing or with more 
Camlessmaistimet  WrANCMES 201.62 0s s Sao ess Oa ee ne if 
Veins of membrane simple or but shghtly braneched...... 9 
Seutellum broadly rounded at apex, as long as or nearly as 
long as corium which has the apical margin rounded and 
imesapicallancle obtuse... 0... ee Coenus (8) 
Seutellum narrowed at apex, shorter than corium which 
has the apical margin straight or sinuate and the apical 
RMPMIC MAC UUUC es) che deni hakitisan seek oh crease olie Mate Scare Oe LL en amE RNR UCAaTs 8 
Buceulae gradually increasing in height posteriorly, ending 
abruptly; frena extending just to middle of scutellum; 
lateral pronotal margins not explanate; rostrum extending 
aguucle bemmad midcoxae y. 2: sa Hymenarcys (9) 
Bucculae decreasing in height posteriorly, elevated into an 
angle anteriorly; frena extending beyond middle of scu- 
tellum; lateral pronotal margins explanate anteriorly ; ros- 
trum extending behind postcoxae........... Menecles (12) 
Frena not extending beyond middle of seutellum....... 10 
Frena extending beyond middle of scutellum........... 1 
Lateral pronotal margins with a prominent process bent 
slightly backwards at humeral angles..... Prionosoma (13) 
Lateral pronotal margins entire, the humeral angles round- 
ed and not FOMOUMUT CEUDE Favela voces, satan ceere Wii aors oie ces} 
