1897. I THE SPECIES OF THE GENUS MELAXOPLUS. 11 



metazona ; hind tibiae uniform in 

 color beyond the patellar spot ; teg- 

 mina transversely convex, so that the 

 dorsal and lateral fields are not dis- 

 tinguished from each other by any 

 angle; costal margin of same regu- 

 larly arcuate washingtonianus . 



fP'. Prozona much longer than the 

 metazona ; hind tibiae with a broad 

 pallid subbasal annulation; dorsal 

 and lateral fields of tegmina set in 

 distinct planes ; costal margin of 



same angulato-arcuate walshii, 



TTL-. Interspace between mesosternal 

 lobes of female fully as broad as the 

 lobes ; cerci of male scarcely half so 

 broad in the apical half as at base .... 



altitiidinum. 

 E-. Interspace between the eyes of male no 

 broader than the first antennal joint ; anal 

 cerci of male with nearly straight upper 

 margin ; subgenital plate not apically eleva- 

 ted though furnished with a backv/ard 

 directed tubercle formed by the angulation 



of the margin gracilipes. 



p. Tegmina lateral, widely separated ; cerci 

 of male apically truncate ; furcula obsolescent ; 

 subgenital plate relatively short, of unequal 



breadth geniculatus, 



P. Apical margin of subgenital plate of male 

 neither elevated nor tuberculate, the margins, as 

 seen from above, apically transverse. . , .rusticus. 

 g^. Cerci of male tapering distinctly and abruptly, 

 the apical less or almost less, generally very much 

 less, than half as broad as the basal portion, and more 

 or less acuminate (Borckii series). 



/i^. Subgenital plate of male more or less elevated 

 posteriorly, but with no distinct apical tubercle. 

 P. Posterior margin of pronotum not mesially 

 emarginate; tegmina attingent or approximate. 



