260 F. W. GODING, M. D. 



ee. Body slender, prothorax low, not compresso-elevated, middle of 

 back acutely carinated, furnished with an anterior process, 

 long, thickened, subcompressed, porrect, apex ascending, 

 posterior process long, equaling or exceeding apex of tegmina, 

 somewhat narrowed toward apex, before middle subcoarctate. 



Accltinophora Stal. 

 Subfamily Hoplophorin^: Stal. 



A. Wings with four apical cells. 



a. Prothorax more or less compresso-elevated, lateral angles produced. 



Triquetra Fairm. 

 aa. Prothorax convex, unarmed or with a pori-ect horn in front, lateral angles 

 scarcely or subpromiuent. 



b. Prothorax unarmed, lateral angles subpromiuent Ochropepla Stal. 



66. Prothorax armed in front with a porrect horn, lateral angles scarcely 

 prominent Potnia Stal. 



B. Wings with three apical cells. 



c. Anal cells of wings distinct, sublobate, one-nerved, posterior prothoracic 

 process with apex not or slightly surpassing apex of abdomen. 

 d. Head very broad, obtuse, equal in breadth to base of prothoracic process, 



which is narrowed from the ba.se Platycotis Stal. 



e. Front of prothorax strongly declivous, anterior margin between eyes 



broadly sinuate. 



*. Prothorax convex, unarmed, or in middle armed before lateral angles 



with a compressed, more or less porrect horu..Subg. Platycotis Stal. 



**. Prothorax in front convex, behind lateral angles armed with a horn 



or process Subg. Lophopelta Stal. 



e, *. Front of prothorax less convex, sensibly and not at all perpendicularly 

 declivous, anterior margin between eyes straight, lateral angles not 

 or slightly prominent, posterior prothoracic process at the base first 



slightly then distinctly narrowed Subg. Microschema Stal. 



del. Head narrower than base of prothoracic process.. Hoplopliora Germ. 

 *. Prothorax destitute of an anterior or dorsal horn, posterior process 



with sides parallel towards base Subg. Hoplophora Stal. 



**. Prothorax armed anteriorly with an oblique, porrect, compressed 



horn, posterior process narrowed from base. .Subg. Enchotype Stal. 



cc. Anal cells of wings very minute, not lobate ; prothorax with an erect or 



inclined dorsal horn ; posterior process surpassing apex of abdomen. 



Umboiiia A. et S. 



Total number of genera in North America, sixty-five. 



In the preparation of the above synopses 1 consulted the works 

 of Stal, Fairmaire, Amyot et Serville, and the few American writers 

 who have published their observations in this family. But my own 

 collection has been of the greatest use. 



A few errors may be discovered in these tables, as in some instances 

 the location of certain genera were determined from a single repre- 

 sentative. But in response to many requests I have prepared the 

 tables, trusting that future studies will correct all inaccuracies. 



