1897.] THE SPECIES OF THE GEXUS MELAXOPLUS. 17 



d^. Subgenital plate of male with a distinct though minute 



independent ^ apical tubercle occidentalis. 



d\ Subgenital plate of male with only an obscure trace of 



an apical tubercle cuneatus. 



c^. Cerci of male with no striking inequality in breadth 



flabellifer. 

 b'. Cerci of male tapering from the very base towards the mid- 

 dle, rarely equal in basal portion,-^ generally long and slender, 

 and rarely as little as twice as long as broad. 



r\ Cerci of male beyond the middle either equal or tapering, 

 the tip usually slender or acuminate, never bifurcate/ 



d^. Furcula of male developed as large flattened lobes about 

 half as long as the supraanal plate and exceptionally broad, 

 but apically narrowed by the considerable excision of their 

 inner side ; subgenital plate not elevated apically above the 

 lateral margins (Bowditchi series). 



<?\ Body, tegmina and legs almost wholly green, the hind 

 femora not banded. 

 y ^ Sides of disk of prozona with a distinct narrow yellow 

 stripe extending to the upper margin of the eyes ; pas- 

 sage of the disk of pronotum into the lateral lobes more 

 gradual than in the alternate category ; hind tibiae 



green ; antennae apically infuscated herbaceus. 



/-. Disk of pronotum and summit of head uniform in 

 coloration, the forming passing into the lateral lobes 

 with a more distinct angle than in the alternate cate- 

 gory ; hind tibiae blue; antennae uniform., .flavescens. 

 e^. Body, tegmina and legs brown or testaceous, the hind 

 femora generally banded with dark colors. 

 f^. Forks of the male furcula more or less obliquely or 

 transversely truncate at tip and given an oppositely 

 hooked appearance by the rounded excision of the 

 inner margin ; hind femora generally distinctly banded. 

 g\ Highly variegated, the lateral lobes of pronotum 

 conspicuously marked with an unequal bright flavous 



' That is, not formed by the culmination of the more or less pyramidal form of 

 the subgenital plate. 



"^ In rare instances it expands slightly from the extreme base, but is then 

 greatly expanded apically. 



3 In M. ater it enlarges feebly apically. 



PROC. AMER. PHILOS. SCO. XXXYI. 154. B. PRINTED APRIL 5, 1897. 



