1897.] THE SPECIES OF THE GENTS MELAXOPLUS. 23 



though sometimes with the margin itself apically 

 thickened. 



/\ Interspace between mesosternal lobes of male 



distinctly longer, generally much longer than 



broad, and much narrower than the lobes ; meta- 



sternal lobes attingent or subattingent in the 



male (Dawsoni series). 



y\ Subgenital plate of male broad, at least as 



broad as long ; cerci incurved feebly and 



gently, cr not at all ; hind tibiae red . .dawsoni. 



j\ Subgenital plate of male rather narrow, 



narrower than long, although short ; cerci 



abruptly incurved apically ; hind tibiae yellow. 



J^. Tegmina only attaining the tip of the hind 



femora \ supraanal plate of male suddenly 



depressed in apical half; furcula slightly 



developed, shorter than last dorsal segment. 



gladstoni. 

 k^. Tegmina considerably surpassing the tip 

 of the hind femora ; supraanal plate of male 

 not apically depressed ; furcula well devel- 

 oped, about one-third as long as the supra- 

 anal plate palmeri. 



P. Interspace between mesosternal lobes of male 

 quadrate, almost or a little transverse and but 

 little narrower than the lobes ; metasternal lobes 

 of male only approximate (Fasciatus series). 

 y\ Cerci of male no slenderer or hardly 

 slenderer on apical than on basal half, far sur- 

 passing the supraanal plate ; furcula very slight, 

 not so long as last dorsal segment. . .fasciatus. 

 j"'. Cerci much slenderer on apical than on 

 basal half, shorter than the supraanal plate ; 

 furcula long and slender, reaching the middle 



of the supraanal plate borealis. 



f-. Subgenital plate of male conspicuously narrower at 

 apex than at base Cgenerally only half as wide), rarely at 

 all elevated at apex above the lateral margins and never 

 notched ;^ cerci always distinctly narrowing on basal 



1 Except in M. jnonticola, where it is very broadly and shallowly notched by 

 the tubercular elevation of the extremities of the apical margin. 



