THE GENERA OF NORTH AMERICAN MELANOPLI. 



By Samuel H. Scudder. 



Presented January 13, 1897. 



In an extended paper upon the Melanopli (Pezotettiges Brunn.) to be 

 published by the U. S. National Museum, I have treated this group 

 monographically, with full descriptions of each genus and species, accom- 

 panied by keys for their determination. As some time must elapse before 

 the final publication of this work, which was completed in December, 

 1895, and will be abundantly illustrated, I present herewith, by per- 

 mission of the Museum, the table therein given for the determination of 

 the genera of Melanopli, appending a few remarks to show how the 

 species already known are distributed among them. The fuller paper 

 will contain the complete revision, with full synonymy. 



Table of the Genera of North American Melanopli. 



A^. Lateral margins of subgenital plate (last ventral segment) of male, 

 as seen laterally, straight throughout or very slightly convex, never at 

 all abruptly ampliate at the base. 



b^. Body exceptionally slender ; mesosternal lobes subattingent in both 

 sexes ; prozona three times as long as metazona . . Gymnoscirtetes. 

 b^. Body not exceptionally slender ; mesosternal lobes in both sexes so 

 widely separated that the interspace between them is at most twice as 

 long as broad ; prozona not more than twice as long as metazona. 

 c\ Interspace between mesosternal lobes of female decidedly trans- 

 verse, sometimes twice as broad as long ; of male sometimes trans- 

 verse, sometimes quadrate or subquadrate ; tegmina lobiform, linear, 

 or wanting. 



d^. Interspace between mesosternal lobes of male decidedly trans- 

 verse, as broad as or broader than the lobes ; pronotum without 

 lateral carinas ; tegmina ovate or wanting .... Netrosoma. 



