1897.] THE SPECIES OF THE GENUS MELANOPLUS. 13 



spatulate or subspatulate ;^ metasternal lobes of male sepa- 

 rated by a variable interval. 



d^. Interspace between mesosternal lobes of male quadrate 

 or subquadrate, rarely half as long again as broad (J/. 

 ampiectens); metasternal lobes of male of variable width. 

 e^. Subgenital plate of male distinctly narrower than long, 

 often narrowing apically. 

 /^ Lateral margins of subgenital plate of male apically 

 meeting more or less acutely, and here furnished with a 

 conical erect tubercle (Inornatus series). 

 g^. Interspace between mesosternal lobes of female 

 slightly longer than broad ', anal cerci of male broadly 

 expanded apically ; apical tubercle of subgenital plate 



of male blunt inornatus. 



g^. Interspace between mesosternal lobes of female 

 distinctly transverse f anal cerci of male very feebly 

 expanded apically ) apical tubercle of subgenital plate 

 acute. 



h^. Hind femora fasciate ; apical half of male cerci 

 moderately broad, the narrowest part more than 

 half as broad as the base ; lobes of furcula short.. . . 



viridipes. 

 /^^ Hind femora not fasciate ; apical half of male 

 cerci very slender, the narrowest part not more 

 than a third as broad as the base ; lobes of furcula 



long decorus. 



/'. Lateral margins of subgenital plate of male meeting 

 with a rounded curve which, if apically elevated, does 

 not form a conical tubercle (Fasciatus series). 



g^. Cerci of male strongly incurved and conspicuously 

 enlarged apically. 



h^. Cerci of male very slender, in the middle not 

 one-third as broad as at base, the apical lobe feebly 

 bifid ; furcula developed as slender spines about a 

 fourth the length of the supraanal plate . . attenuaius. 

 h\ Cerci of male stout, in the middle more than 



1 The cerci are barely enlarged apically in AI. viridipes, which comes under 

 this division. See also the note under the alternate category. 



2 The female of M, decorus is not known. 



