210 NORTH AMERICAN MELANOPLI (ORTHOPTERA) 



adjacent, their lateral margins curving obliquely to the adjacent acute- 

 angulate meso-distal apices, their caudal faces moderately concave. 



Allotype. — $ ; same data as type, but taken by M. R. Grif- 

 fith. [Hebard Collection]. 



Decidedly larger and more robust than male, but proportionate difference 

 between the sexes slightly less than in the other species excepting nigro- 

 picta. Form and coloration definitely different from that of this sex of 

 any other known species of the genus. Tegmina similar to those of male 

 but slightly less well developed, slightly narrower in proportions and reach- 

 ing only to median point on tympana. Curved apices of dorsal valves of 

 ovipositor relatively short. 



Male generally olivaceous, a moderately broad post-ocular band of 

 whitish margins the pronotal disk laterad and is continued to include the 

 dorsal portion of the tegmina, a brownish suffusion narrowly margining this 

 on lateral lobes and ventral portions of tegmina of that color. Furcula 

 and medio-longitudinal portion of supra-anal plate light pink, this more 

 weakly suggested medio-longitudinally dorsad on abdomen and in genicular 

 areas of caudal femora, the bases of the genicular areas marked with a 

 small black area on each side. Caudal tibiae pink, blackish very briefly 

 proximad and suffused and darkened (individually to different degrees) 

 internally for some distance distad, spines and apices of spurs black. Caudal 

 tarsi pink. 



Female rich green except for dorsal portions of tegmina which are paler, 

 similar inconspicuous blackish markings on caudal limbs except the pink 

 caudal tibiae lack the disto-internal suffusion. 



The extremes in measurements are as follows: length of body #19.5 to 

 20.1, $ 27.7 to 28.8; length of pronotum $ 4.7 to 4.8, $ 6.2 to 6.3; caudal 

 width of pronotal disk $ 3.7 to 3.7, $ 5.9 to 6.; length of tegmen $ 4.2 to 

 4.2, $ 4.8 to 4.9; length of caudal femur S 10.7 to 10.9, $ 13. to 13.6 mm. 



Two male and three female paratypes bear the same data as 

 the described pair except that one female was secured by J. D. 

 Beamer. 



Aptenopedes sphenarioides and its races 



The present species, more slenderly cylindrical than any of 

 the others belonging to the genus Aptenopedes and possessing 

 narrow pad-like tegmina, developed elsewhere only in robusta 

 here described, is found to be definitely even more complex in 

 its geographic differentiation than is aptera Scudder. 



