8o STUDIES IN NORTH AMERICAN MEMBRACID^ 



8. Crest moderately elevated ; the dorsal line regularly ar- 



cuated, the males frequently much lower and merely 

 carinated above; elytra hyaline or nearly so, 9 



-. Form recalling Ophiderma, broad and transversely rounded 

 with the crest but little elevated; elytra usually fuligi 

 nous or maculated, 16 



9. Characteristic markings distinct, at least in the mature fe 



males, 10 



Characteristic markings more or less obscured or obsolete, 



12 



10. Clypeus carinated, produced at apex in a slender acute pro 



cess; inhabits the Rocky Mountain region, 



12, acutus VanD 

 Clypeus broad and rounded at apex, 



11. Color pale testaceous to brown in the females, more or less 



blackish in the males, 10, van Say 



Color dark brown or black, with the markings strongly 

 contrasted, irrorated with pale anteriorly; a little larger 

 than van with the crest more elevated and the anterior 

 vitta meeting in a more acute angle, 11, limns VanD. 



12. Dorsal crest moderately elevated, regularly arcuated from 



the base of the metopidium, the anterior sinus hardly 

 distinguished ; characteristic markings represented at 

 least by the anterior vitta, the posterior faintly indicated, 



i3- 



-. Crest less elevated; markings, if present, represented by 



slightly oblique fuscous vittse and brown frontal spots, 



14. 



13. Elytra faintly fuliginous, apex broadly fuscous; metopidium 



with an arcuated brown ray on either side, which is con- 

 tinued across the face next the eye, 



8, discoidalis Emm. 



- Elytra hyaline; female pale greenish yellow with the an- 

 terior oblique vitta represented by an arcuated black line 

 meeting in an acute angle on the dorsal carina; behind 

 this line paler and faintly banded ; male black with the 

 vittae slender and white, 9, ductus VanD. 



14. Color ferruginous or fuscous brown, immaculate or nearly 



so, 14, intermedins Emm. 



