THE SPECIES OF THE GEXUS MELANOPLUS. [Jan. 15, 



truncate ; disk of metazona less than twice as broad 

 as long ; tegmina relatively broad, approximate, at 



least in the male aridus. 



g'. Cerci of male long and broad throughout, sub- 

 equal, broader than the frontal costa ; last dorsal seg- 

 ment of male with no oblique sulci outside the fur- 

 cula; subgenital plate elevated apically (Indigens 



series) indigens. 



^^ Cerci of male short, or not very long, and broad 

 or moderately slender, in the middle nearly as broad 

 as, if not broader than, the frontal costa; last dorsal 

 segment of male with no oblique sulci outside the 

 furcula ; subgenital plate not elevated apically (Man- 

 cus series). 



/i^. Prozona, at least in male, much longer than 



broad, the disk of the whole pronotum more than 



twice as long as the middle breadth, the median 



^ carina percurrent, equal ; interval between meso- 



sternal lobes of male twice as long as broad 



scudderi. 

 H\ Prozona, even in male, transverse, subquadrate 

 or slightly longitudinal, the disk of the whole pro- 

 notum less than twice as long as middle breadth, 

 the median carina often subobsolete between the 

 sulci ; interspace between the mesosternal lobes of 

 male not more than half as long again as broad. 

 /^. Cerci of male rather stout, subequal. 

 y\ Abdomen of male strongly recurved ; forks 

 of furcula divergent, distinctly longer than the 

 last dorsal segment ; subgenital plate with no 



apical tubercle gillettei. 



j"^. Abdomen of male scarcely recurved ; forks 

 of furcula parallel, minute, hardly as long as 

 the last dorsal segment; subgenital plate with 



a slight apical tubercle artemtsice. 



P. Cerci of male rather slender, especially on 

 apical half, of unequal width. 

 y\ Tegmina shorter than the pronotum, 

 broadly rounded or subangulate at apex; cerci 

 of male long and rather slender, nearly straight 

 as seen laterally mancus. 



