42 IOWA ACADEMY OF SCIENCES 



CC. Scutellum rarely extending farther caudad than 

 corium, in that case sides of pronotum always entire 

 near lateral angle. 

 I). Jugum with a prominent lateral tooth near apex, 

 or with apex pointed and projecting far ceph- 

 alad of tylus; sides of head not distinctly sinuate 

 just cephalad of eyes, antennal tubercles visible 

 from above, and eyes placed close to cephalic 

 angles of pronotum. (Tribe Halyaria.) 



E. Jugum with lateral tooth near apex; antennal 

 segment 2 cylindrical, shorter than segment 3; 

 . venter with shallow mesal sulcus; body 

 rather broad. Brochynieiia. 



EE Jugum without lateral tooth, somewhat pointed 

 at apex, projecting far cephalad of tylus; 

 antennal segment 2 triangular, longer than 

 segment 8; venter without sulcus; body elon- 

 gate. Mecidea. 

 DD. Jugum without lateral tooth; apex usually 

 rounded, rarely pointed, in that case not 

 projecting cephalad of tylus; sides of head 

 usually distinctly sinuate near eyes, sometimes 

 almost straight, in that case either antennal 

 tubercles not at all visible from above or the 

 eyes quite distant from cephalic angles of pro- 

 notum. 

 E. Head triangular, very convex on dorsal sur- 

 face, not less than seven-eighths as broad as 

 scutellum; juga distinctly longer than tylus; 

 apex of corium broadly rounded. 



(Tribe Aellaria.) 

 F. Pronotum with three longitudinal low 

 ridges; cephalic angles of pronotum pro- 

 jecting conspicuously cephalad. Aelia. 

 FF. Pronotum with a single (mesal) longitud- 

 inal ridge; cephalic angles of pronotum 

 not projecting cephalad. Neottig/ossa. 

 EE. Head of various forms, usually only slightly 

 convex on dorsal surface, less than seven- 

 eighths as broad as scutellum; juga usually 

 no longer than tylus, and apex of corium 

 with a distinct though usually somewhat 



